diff --git a/e2e/test-data/condition_set_storage.json b/e2e/test-data/condition_set_storage.json
new file mode 100644
index 0000000000..8fa8cd0c8d
--- /dev/null
+++ b/e2e/test-data/condition_set_storage.json
@@ -0,0 +1,22 @@
+{
+  "cookies": [],
+  "origins": [
+    {
+      "origin": "http://localhost:8080",
+      "localStorage": [
+        {
+          "name": "mct",
+          "value": "{\"mine\":{\"identifier\":{\"key\":\"mine\",\"namespace\":\"\"},\"name\":\"My Items\",\"type\":\"folder\",\"composition\":[{\"key\":\"954af939-eaf8-4977-8cee-57f36b58aae3\",\"namespace\":\"\"}],\"location\":\"ROOT\",\"modified\":1725480977300,\"created\":1725480975674,\"persisted\":1725480977301},\"954af939-eaf8-4977-8cee-57f36b58aae3\":{\"identifier\":{\"key\":\"954af939-eaf8-4977-8cee-57f36b58aae3\",\"namespace\":\"\"},\"name\":\"Test Condition Set\",\"type\":\"conditionSet\",\"configuration\":{\"conditionTestData\":[],\"conditionCollection\":[{\"id\":\"1f4b8d87-297b-4a2a-a2d2-46c42eb41b39\",\"configuration\":{\"name\":\"Test Condition\",\"output\":\"Test Condition Met\",\"trigger\":\"all\",\"criteria\":[{\"id\":\"034b4dfe-b17e-43f0-9787-93e4666d2690\",\"telemetry\":{\"key\":\"1eafa8cc-092f-4a5f-9206-9e5d8a070ea1\",\"namespace\":\"\"},\"operation\":\"greaterThan\",\"input\":[0],\"metadata\":\"sin\"}]},\"summary\":\"Match if all criteria are met:  VIPER Rover Heading Sine  > 0 \"},{\"isDefault\":true,\"id\":\"c56ff651-547e-4704-a8b7-4f01247e2fa7\",\"configuration\":{\"name\":\"Default\",\"output\":\"Test Condition Unmet\",\"trigger\":\"all\",\"criteria\":[]},\"summary\":\"\"}]},\"composition\":[{\"key\":\"1eafa8cc-092f-4a5f-9206-9e5d8a070ea1\",\"namespace\":\"\"}],\"telemetry\":{},\"notes\":\"framework/generateLocalStorageData.e2e.spec.js\\nGenerate Conditional Styling Data @localStorage @generatedata\\nGenerate basic condition set\\nchrome\",\"modified\":1725480978924,\"location\":\"mine\",\"created\":1725480977299,\"persisted\":1725480978924},\"1eafa8cc-092f-4a5f-9206-9e5d8a070ea1\":{\"identifier\":{\"key\":\"1eafa8cc-092f-4a5f-9206-9e5d8a070ea1\",\"namespace\":\"\"},\"name\":\"VIPER Rover Heading\",\"type\":\"generator\",\"telemetry\":{\"period\":5,\"amplitude\":1,\"offset\":0,\"dataRateInHz\":1,\"phase\":0,\"randomness\":0,\"loadDelay\":0,\"infinityValues\":false,\"exceedFloat32\":false,\"staleness\":false},\"modified\":1725480978545,\"location\":\"954af939-eaf8-4977-8cee-57f36b58aae3\",\"created\":1725480977993,\"persisted\":1725480978545}}"
+        },
+        {
+          "name": "mct-tree-expanded",
+          "value": "[]"
+        },
+        {
+          "name": "mct-recent-objects",
+          "value": "[{\"objectPath\":[{\"identifier\":{\"key\":\"954af939-eaf8-4977-8cee-57f36b58aae3\",\"namespace\":\"\"},\"name\":\"Test Condition Set\",\"type\":\"conditionSet\",\"configuration\":{\"conditionTestData\":[],\"conditionCollection\":[{\"isDefault\":true,\"id\":\"c56ff651-547e-4704-a8b7-4f01247e2fa7\",\"configuration\":{\"name\":\"Default\",\"output\":\"Default\",\"trigger\":\"all\",\"criteria\":[]},\"summary\":\"Default condition\"}]},\"composition\":[{\"key\":\"1eafa8cc-092f-4a5f-9206-9e5d8a070ea1\",\"namespace\":\"\"}],\"telemetry\":{},\"notes\":\"framework/generateLocalStorageData.e2e.spec.js\\nGenerate Conditional Styling Data @localStorage @generatedata\\nGenerate basic condition set\\nchrome\",\"modified\":1725480977994,\"location\":\"mine\",\"created\":1725480977299,\"persisted\":1725480977994},{\"identifier\":{\"key\":\"mine\",\"namespace\":\"\"},\"name\":\"My Items\",\"type\":\"folder\",\"composition\":[{\"key\":\"954af939-eaf8-4977-8cee-57f36b58aae3\",\"namespace\":\"\"}],\"location\":\"ROOT\",\"modified\":1725480977300,\"created\":1725480975674,\"persisted\":1725480977301},{\"identifier\":{\"key\":\"ROOT\",\"namespace\":\"\"},\"name\":\"Open MCT\",\"type\":\"root\",\"composition\":[{\"key\":\"mine\",\"namespace\":\"\"}]}],\"navigationPath\":\"/browse/mine/954af939-eaf8-4977-8cee-57f36b58aae3\",\"domainObject\":{\"identifier\":{\"key\":\"954af939-eaf8-4977-8cee-57f36b58aae3\",\"namespace\":\"\"},\"name\":\"Test Condition Set\",\"type\":\"conditionSet\",\"configuration\":{\"conditionTestData\":[],\"conditionCollection\":[{\"isDefault\":true,\"id\":\"c56ff651-547e-4704-a8b7-4f01247e2fa7\",\"configuration\":{\"name\":\"Default\",\"output\":\"Default\",\"trigger\":\"all\",\"criteria\":[]},\"summary\":\"Default condition\"}]},\"composition\":[{\"key\":\"1eafa8cc-092f-4a5f-9206-9e5d8a070ea1\",\"namespace\":\"\"}],\"telemetry\":{},\"notes\":\"framework/generateLocalStorageData.e2e.spec.js\\nGenerate Conditional Styling Data @localStorage @generatedata\\nGenerate basic condition set\\nchrome\",\"modified\":1725480977994,\"location\":\"mine\",\"created\":1725480977299,\"persisted\":1725480977994}},{\"objectPath\":[{\"identifier\":{\"key\":\"1eafa8cc-092f-4a5f-9206-9e5d8a070ea1\",\"namespace\":\"\"},\"name\":\"VIPER Rover Heading\",\"type\":\"generator\",\"telemetry\":{\"period\":5,\"amplitude\":1,\"offset\":0,\"dataRateInHz\":1,\"phase\":0,\"randomness\":0,\"loadDelay\":0,\"infinityValues\":false,\"exceedFloat32\":false,\"staleness\":false},\"modified\":1725480978545,\"location\":\"954af939-eaf8-4977-8cee-57f36b58aae3\",\"created\":1725480977993,\"persisted\":1725480978545},{\"identifier\":{\"key\":\"954af939-eaf8-4977-8cee-57f36b58aae3\",\"namespace\":\"\"},\"name\":\"Test Condition Set\",\"type\":\"conditionSet\",\"configuration\":{\"conditionTestData\":[],\"conditionCollection\":[{\"isDefault\":true,\"id\":\"c56ff651-547e-4704-a8b7-4f01247e2fa7\",\"configuration\":{\"name\":\"Default\",\"output\":\"Default\",\"trigger\":\"all\",\"criteria\":[]},\"summary\":\"Default condition\"}]},\"composition\":[{\"key\":\"1eafa8cc-092f-4a5f-9206-9e5d8a070ea1\",\"namespace\":\"\"}],\"telemetry\":{},\"notes\":\"framework/generateLocalStorageData.e2e.spec.js\\nGenerate Conditional Styling Data @localStorage @generatedata\\nGenerate basic condition set\\nchrome\",\"modified\":1725480977994,\"location\":\"mine\",\"created\":1725480977299,\"persisted\":1725480977994},{\"identifier\":{\"key\":\"mine\",\"namespace\":\"\"},\"name\":\"My Items\",\"type\":\"folder\",\"composition\":[{\"key\":\"954af939-eaf8-4977-8cee-57f36b58aae3\",\"namespace\":\"\"}],\"location\":\"ROOT\",\"modified\":1725480977300,\"created\":1725480975674,\"persisted\":1725480977301},{\"identifier\":{\"key\":\"ROOT\",\"namespace\":\"\"},\"name\":\"Open MCT\",\"type\":\"root\",\"composition\":[{\"key\":\"mine\",\"namespace\":\"\"}]}],\"navigationPath\":\"/browse/mine/954af939-eaf8-4977-8cee-57f36b58aae3/1eafa8cc-092f-4a5f-9206-9e5d8a070ea1\",\"domainObject\":{\"identifier\":{\"key\":\"1eafa8cc-092f-4a5f-9206-9e5d8a070ea1\",\"namespace\":\"\"},\"name\":\"VIPER Rover Heading\",\"type\":\"generator\",\"telemetry\":{\"period\":10,\"amplitude\":1,\"offset\":0,\"dataRateInHz\":1,\"phase\":0,\"randomness\":0,\"loadDelay\":0,\"infinityValues\":false,\"exceedFloat32\":false,\"staleness\":false},\"modified\":1725480978542,\"location\":\"954af939-eaf8-4977-8cee-57f36b58aae3\",\"created\":1725480977993,\"persisted\":1725480977993}},{\"objectPath\":[{\"identifier\":{\"key\":\"mine\",\"namespace\":\"\"},\"name\":\"My Items\",\"type\":\"folder\",\"composition\":[{\"key\":\"954af939-eaf8-4977-8cee-57f36b58aae3\",\"namespace\":\"\"}],\"location\":\"ROOT\",\"modified\":1725480977300,\"created\":1725480975674,\"persisted\":1725480977301},{\"identifier\":{\"key\":\"ROOT\",\"namespace\":\"\"},\"name\":\"Open MCT\",\"type\":\"root\",\"composition\":[{\"key\":\"mine\",\"namespace\":\"\"}]}],\"navigationPath\":\"/browse/mine\",\"domainObject\":{\"identifier\":{\"key\":\"mine\",\"namespace\":\"\"},\"name\":\"My Items\",\"type\":\"folder\",\"composition\":[{\"key\":\"954af939-eaf8-4977-8cee-57f36b58aae3\",\"namespace\":\"\"}],\"location\":\"ROOT\",\"modified\":1725480977300,\"created\":1725480975674,\"persisted\":1725480977301}}]"
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/e2e/tests/framework/generateLocalStorageData.e2e.spec.js b/e2e/tests/framework/generateLocalStorageData.e2e.spec.js
index 544a04e25f..822c51ebb1 100644
--- a/e2e/tests/framework/generateLocalStorageData.e2e.spec.js
+++ b/e2e/tests/framework/generateLocalStorageData.e2e.spec.js
@@ -286,6 +286,55 @@ test.describe('Generate Visual Test Data @localStorage @generatedata @clock', ()
   });
 });
 
+test.describe('Generate Conditional Styling Data @localStorage @generatedata', () => {
+  test('Generate basic condition set', async ({ page, context }) => {
+    await page.goto('./', { waitUntil: 'domcontentloaded' });
+    // Create a Condition Set
+    const conditionSet = await createDomainObjectWithDefaults(page, {
+      type: 'Condition Set',
+      name: 'Test Condition Set'
+    });
+
+    // Create a Telemetry Object (Sine Wave Generator)
+    const swg = await createExampleTelemetryObject(page, conditionSet.uuid);
+
+    // Edit the Telemetry Object to have a 10hz data rate (Gotta go fast!)
+    await page.goto(swg.url);
+    await page.getByLabel('More actions').click();
+    await page.getByRole('menuitem', { name: 'Edit Properties...' }).click();
+    await page.getByLabel('Period', { exact: true }).fill('5');
+    await page.getByLabel('Save').click();
+
+    // Edit the Condition Set
+    await page.goto(conditionSet.url);
+    await page.getByLabel('Edit Object').click();
+
+    // Add a Condition to the Condition Set
+    await page.getByLabel('Add Condition').click();
+    await page.getByLabel('Condition Name Input').first().fill('Test Condition');
+    await page.getByLabel('Condition Output Type').first().selectOption('String');
+    await page.getByLabel('Condition Output String').first().fill('Test Condition Met');
+
+    // Condition: True if sine value > 0 (half the time)
+    await page.getByLabel('Criterion Telemetry Selection').selectOption(swg.name);
+    await page.getByLabel('Criterion Metadata Selection').selectOption('Sine');
+    await page.getByLabel('Criterion Comparison Selection').selectOption('is greater than');
+    await page.getByLabel('Criterion Input').first().fill('0');
+
+    // Rename default condition
+    await page.getByLabel('Condition Output String').nth(1).fill('Test Condition Unmet');
+    await page.getByLabel('Save').click();
+    await page.getByRole('listitem', { name: 'Save and Finish Editing' }).click();
+
+    // Save localStorage for future test execution
+    await context.storageState({
+      path: fileURLToPath(
+        new URL('../../../e2e/test-data/condition_set_storage.json', import.meta.url)
+      )
+    });
+  });
+});
+
 test.describe('Validate Overlay Plot with Telemetry Object @localStorage @generatedata', () => {
   test.use({
     storageState: fileURLToPath(
diff --git a/e2e/tests/functional/plugins/styling/conditional/displayLayoutConditionalStyling.e2e.spec.js b/e2e/tests/functional/plugins/styling/conditional/displayLayoutConditionalStyling.e2e.spec.js
new file mode 100644
index 0000000000..f2a0a8ec78
--- /dev/null
+++ b/e2e/tests/functional/plugins/styling/conditional/displayLayoutConditionalStyling.e2e.spec.js
@@ -0,0 +1,114 @@
+/*****************************************************************************
+ * Open MCT, Copyright (c) 2014-2024, United States Government
+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT is licensed under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ * Open MCT includes source code licensed under additional open source
+ * licenses. See the Open Source Licenses file (LICENSES.md) included with
+ * this source code distribution or the Licensing information page available
+ * at runtime from the About dialog for additional information.
+ *****************************************************************************/
+
+import { fileURLToPath } from 'url';
+
+import {
+  createDomainObjectWithDefaults,
+  navigateToObjectWithRealTime
+} from '../../../../../appActions.js';
+import { expect, test } from '../../../../../pluginFixtures.js';
+
+const TINY_IMAGE_BASE64 =
+  'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAIAQMAAAD+wSzIAAAABlBMVEX///+/v7+jQ3Y5AAAADklEQVQI12P4AIX8EAgALgAD/aNpbtEAAAAASUVORK5CYII';
+
+test.describe('Display Layout Conditional Styling', () => {
+  test.use({
+    storageState: fileURLToPath(
+      new URL('../../../../../test-data/condition_set_storage.json', import.meta.url)
+    )
+  });
+
+  let displayLayout;
+  test.beforeEach(async ({ page }) => {
+    await page.goto('./', { waitUntil: 'domcontentloaded' });
+    displayLayout = await createDomainObjectWithDefaults(page, {
+      type: 'Display Layout',
+      name: 'Test Display Layout'
+    });
+  });
+
+  test('Image Drawing Object can have visibility toggled conditionally', async ({ page }) => {
+    await page.getByLabel('Edit Object').click();
+
+    // Add Image Drawing Object to the layout
+    await page.getByLabel('Add Drawing Object').click();
+    await page.getByLabel('Image').click();
+    await page.getByLabel('Image URL').fill(TINY_IMAGE_BASE64);
+    await page.getByText('Ok').click();
+
+    // Use the "Test Condition Set" for conditional styling on the image
+    await page.getByRole('tab', { name: 'Styles' }).click();
+    await page.getByRole('button', { name: 'Use Conditional Styling...' }).click();
+    await page.getByLabel('Modal Overlay').getByLabel('Expand My Items folder').click();
+    await page.getByLabel('Modal Overlay').getByLabel('Preview Test Condition Set').click();
+    await page.getByText('Ok').click();
+
+    // Set the image to be hidden when the condition is met
+    await page.getByTitle('Visible').first().click();
+    await page.getByLabel('Save Style').first().click();
+    await page.getByLabel('Save', { exact: true }).click();
+    await page.getByRole('listitem', { name: 'Save and Finish Editing' }).click();
+
+    // Switch to real-time mode and verify that the image toggles visibility
+    await navigateToObjectWithRealTime(page, displayLayout.url);
+    await expect(page.getByLabel('Image View')).toBeVisible();
+    await expect(page.getByLabel('Image View')).toBeHidden();
+
+    // Reload the page and verify that the image toggles visibility
+    await page.reload({ waitUntil: 'domcontentloaded' });
+    await expect(page.getByLabel('Image View')).toBeVisible();
+    await expect(page.getByLabel('Image View')).toBeHidden();
+  });
+
+  test('Alphanumeric object can have visibility toggled conditionally', async ({ page }) => {
+    await page.getByLabel('Edit Object').click();
+
+    // Add Alphanumeric Object to the layout
+    await page.getByLabel('Expand My Items folder').click();
+    await page.getByLabel('Expand Test Condition Set').click();
+    await page.getByLabel('Preview VIPER Rover Heading').dragTo(page.getByLabel('Layout Grid'));
+
+    // Use the "Test Condition Set" for conditional styling on the alphanumeric
+    await page.getByRole('tab', { name: 'Styles' }).click();
+    await page.getByRole('button', { name: 'Use Conditional Styling...' }).click();
+    await page.getByLabel('Modal Overlay').getByLabel('Expand My Items folder').click();
+    await page.getByLabel('Modal Overlay').getByLabel('Preview Test Condition Set').click();
+    await page.getByText('Ok').click();
+
+    // Set the alphanumeric to be hidden when the condition is met
+    await page.getByTitle('Visible').first().click();
+    await page.getByLabel('Save Style').first().click();
+    await page.getByLabel('Save', { exact: true }).click();
+    await page.getByRole('listitem', { name: 'Save and Finish Editing' }).click();
+
+    // Switch to real-time mode and verify that the image toggles visibility
+    await navigateToObjectWithRealTime(page, displayLayout.url);
+    await expect(page.getByLabel('Alpha-numeric telemetry', { exact: true })).toBeVisible();
+    await expect(page.getByLabel('Alpha-numeric telemetry', { exact: true })).toBeHidden();
+
+    // Reload the page and verify that the alphanumeric toggles visibility
+    await page.reload({ waitUntil: 'domcontentloaded' });
+    await expect(page.getByLabel('Alpha-numeric telemetry', { exact: true })).toBeVisible();
+    await expect(page.getByLabel('Alpha-numeric telemetry', { exact: true })).toBeHidden();
+  });
+});
diff --git a/src/plugins/condition/components/ConditionCollection.vue b/src/plugins/condition/components/ConditionCollection.vue
index ba19d006bb..84b5aff008 100644
--- a/src/plugins/condition/components/ConditionCollection.vue
+++ b/src/plugins/condition/components/ConditionCollection.vue
@@ -27,14 +27,16 @@
     aria-label="Condition Set Condition Collection"
   >
     <div class="c-cs__header c-section__header">
-      <span
+      <button
         class="c-disclosure-triangle c-tree__item__view-control is-enabled"
         :class="{ 'c-disclosure-triangle--expanded': expanded }"
-        @click="expanded = !expanded"
-      ></span>
+        :aria-expanded="expanded"
+        aria-controls="conditionContent"
+        @click="toggleExpanded"
+      ></button>
       <div class="c-cs__header-label c-section__label">Conditions</div>
     </div>
-    <div v-if="expanded" class="c-cs__content">
+    <div v-if="expanded" id="conditionContent" class="c-cs__content">
       <div
         v-show="isEditing"
         class="hint"
@@ -54,9 +56,10 @@
         v-show="isEditing"
         id="addCondition"
         class="c-button c-button--major icon-plus labeled"
+        aria-labelledby="addConditionButtonLabel"
         @click="addCondition"
       >
-        <span class="c-cs-button__label">Add Condition</span>
+        <span id="addConditionButtonLabel" class="c-cs-button__label">Add Condition</span>
       </button>
 
       <div class="c-cs__conditions-h" :class="{ 'is-active-dragging': isDragging }">
diff --git a/src/plugins/displayLayout/components/ImageView.vue b/src/plugins/displayLayout/components/ImageView.vue
index b8d75f52f0..b22b8d87aa 100644
--- a/src/plugins/displayLayout/components/ImageView.vue
+++ b/src/plugins/displayLayout/components/ImageView.vue
@@ -29,7 +29,7 @@
     @end-move="endMove"
   >
     <template #content>
-      <div class="c-image-view" :style="style"></div>
+      <div v-show="showImage" aria-label="Image View" class="c-image-view" :style="style"></div>
     </template>
   </LayoutFrame>
 </template>
@@ -76,6 +76,9 @@ export default {
   },
   emits: ['move', 'end-move'],
   computed: {
+    showImage() {
+      return this.isEditing || !this.itemStyle?.isStyleInvisible;
+    },
     style() {
       let backgroundImage = 'url(' + this.item.url + ')';
       let border = '1px solid ' + this.item.stroke;
diff --git a/src/plugins/displayLayout/components/TelemetryView.vue b/src/plugins/displayLayout/components/TelemetryView.vue
index e7987b9170..8b80e1c9f0 100644
--- a/src/plugins/displayLayout/components/TelemetryView.vue
+++ b/src/plugins/displayLayout/components/TelemetryView.vue
@@ -31,9 +31,10 @@
     <template #content>
       <div
         v-if="domainObject"
+        v-show="showTelemetry"
         ref="telemetryViewWrapper"
         class="c-telemetry-view u-style-receiver"
-        :class="[itemClasses]"
+        :class="classNames"
         :style="styleObject"
         :data-font-size="item.fontSize"
         :data-font="item.font"
@@ -151,7 +152,10 @@ export default {
     };
   },
   computed: {
-    itemClasses() {
+    showTelemetry() {
+      return this.isEditing || !this.itemStyle?.isStyleInvisible;
+    },
+    classNames() {
       let classes = [];
 
       if (this.status) {
diff --git a/src/plugins/telemetryTable/TelemetryTable.js b/src/plugins/telemetryTable/TelemetryTable.js
index dc6ad39dbe..dceaa9e605 100644
--- a/src/plugins/telemetryTable/TelemetryTable.js
+++ b/src/plugins/telemetryTable/TelemetryTable.js
@@ -25,6 +25,7 @@ import _ from 'lodash';
 
 import StalenessUtils from '../../utils/staleness.js';
 import TableRowCollection from './collections/TableRowCollection.js';
+import { MODE, ORDER } from './constants.js';
 import TelemetryTableColumn from './TelemetryTableColumn.js';
 import TelemetryTableConfiguration from './TelemetryTableConfiguration.js';
 import TelemetryTableNameColumn from './TelemetryTableNameColumn.js';
@@ -119,7 +120,7 @@ export default class TelemetryTable extends EventEmitter {
       this.rowLimit = rowLimit;
     }
 
-    if (this.telemetryMode === 'performance') {
+    if (this.telemetryMode === MODE.PERFORMANCE) {
       this.tableRows.setLimit(this.rowLimit);
     } else {
       this.tableRows.removeLimit();
@@ -135,7 +136,7 @@ export default class TelemetryTable extends EventEmitter {
     //If no persisted sort order, default to sorting by time system, descending.
     sortOptions = sortOptions || {
       key: this.openmct.time.getTimeSystem().key,
-      direction: 'desc'
+      direction: ORDER.DESCENDING
     };
 
     this.updateRowLimit();
@@ -172,10 +173,9 @@ export default class TelemetryTable extends EventEmitter {
     this.removeTelemetryCollection(keyString);
 
     let sortOptions = this.configuration.getConfiguration().sortOptions;
-    requestOptions.order =
-      sortOptions?.direction ?? (this.telemetryMode === 'performance' ? 'desc' : 'asc');
+    requestOptions.order = sortOptions?.direction ?? ORDER.DESCENDING; // default to descending
 
-    if (this.telemetryMode === 'performance') {
+    if (this.telemetryMode === MODE.PERFORMANCE) {
       requestOptions.size = this.rowLimit;
       requestOptions.enforceSize = true;
     }
diff --git a/src/plugins/telemetryTable/TelemetryTableType.js b/src/plugins/telemetryTable/TelemetryTableType.js
index bfa5a84d6e..7bbfc4ff3d 100644
--- a/src/plugins/telemetryTable/TelemetryTableType.js
+++ b/src/plugins/telemetryTable/TelemetryTableType.js
@@ -20,6 +20,8 @@
  * at runtime from the About dialog for additional information.
  *****************************************************************************/
 
+import { MODE } from './constants.js';
+
 export default function getTelemetryTableType(options) {
   let { telemetryMode, persistModeChange, rowLimit } = options;
 
@@ -36,11 +38,11 @@ export default function getTelemetryTableType(options) {
         control: 'select',
         options: [
           {
-            value: 'performance',
+            value: MODE.PERFORMANCE,
             name: 'Limited (Performance) Mode'
           },
           {
-            value: 'unlimited',
+            value: MODE.UNLIMITED,
             name: 'Unlimited Mode'
           }
         ],
diff --git a/src/plugins/telemetryTable/collections/TableRowCollection.js b/src/plugins/telemetryTable/collections/TableRowCollection.js
index 98f879c676..d82c383136 100644
--- a/src/plugins/telemetryTable/collections/TableRowCollection.js
+++ b/src/plugins/telemetryTable/collections/TableRowCollection.js
@@ -22,6 +22,7 @@
 import { EventEmitter } from 'eventemitter3';
 import _ from 'lodash';
 
+import { ORDER } from '../constants.js';
 /**
  * @constructor
  */
@@ -208,7 +209,7 @@ export default class TableRowCollection extends EventEmitter {
     const val1 = this.getValueForSortColumn(row1);
     const val2 = this.getValueForSortColumn(row2);
 
-    if (this.sortOptions.direction === 'asc') {
+    if (this.sortOptions.direction === ORDER.ASCENDING) {
       return val1 <= val2 ? row1 : row2;
     } else {
       return val1 >= val2 ? row1 : row2;
@@ -373,7 +374,7 @@ export default class TableRowCollection extends EventEmitter {
 
   getRows() {
     if (this.rowLimit && this.rows.length > this.rowLimit) {
-      if (this.sortOptions.direction === 'desc') {
+      if (this.sortOptions.direction === ORDER.DESCENDING) {
         return this.rows.slice(0, this.rowLimit);
       } else {
         return this.rows.slice(-this.rowLimit);
diff --git a/src/plugins/telemetryTable/components/TableComponent.vue b/src/plugins/telemetryTable/components/TableComponent.vue
index 2b68c83615..082a4ab66d 100644
--- a/src/plugins/telemetryTable/components/TableComponent.vue
+++ b/src/plugins/telemetryTable/components/TableComponent.vue
@@ -296,6 +296,7 @@ import ProgressBar from '../../../ui/components/ProgressBar.vue';
 import Search from '../../../ui/components/SearchComponent.vue';
 import ToggleSwitch from '../../../ui/components/ToggleSwitch.vue';
 import { useResizeObserver } from '../../../ui/composables/resize.js';
+import { MODE, ORDER } from '../constants.js';
 import SizingRow from './SizingRow.vue';
 import TableColumnHeader from './TableColumnHeader.vue';
 import TableFooterIndicator from './TableFooterIndicator.vue';
@@ -713,7 +714,7 @@ export default {
     sortBy(columnKey) {
       let timeSystemKey = this.openmct.time.getTimeSystem().key;
 
-      if (this.telemetryMode === 'performance' && columnKey !== timeSystemKey) {
+      if (this.telemetryMode === MODE.PERFORMANCE && columnKey !== timeSystemKey) {
         this.confirmUnlimitedMode('Switch to Unlimited Telemetry and Sort', () => {
           this.initiateSort(columnKey);
         });
@@ -724,15 +725,15 @@ export default {
     initiateSort(columnKey) {
       // If sorting by the same column, flip the sort direction.
       if (this.sortOptions.key === columnKey) {
-        if (this.sortOptions.direction === 'asc') {
-          this.sortOptions.direction = 'desc';
+        if (this.sortOptions.direction === ORDER.ASCENDING) {
+          this.sortOptions.direction = ORDER.DESCENDING;
         } else {
-          this.sortOptions.direction = 'asc';
+          this.sortOptions.direction = ORDER.ASCENDING;
         }
       } else {
         this.sortOptions = {
           key: columnKey,
-          direction: 'desc'
+          direction: ORDER.DESCENDING
         };
       }
 
@@ -751,7 +752,7 @@ export default {
       }
     },
     shouldAutoScroll() {
-      if (this.sortOptions.direction === 'desc') {
+      if (this.sortOptions.direction === ORDER.DESCENDING) {
         return false;
       }
 
@@ -844,7 +845,7 @@ export default {
       return justTheData;
     },
     exportAllDataAsCSV() {
-      if (this.telemetryMode === 'performance') {
+      if (this.telemetryMode === MODE.PERFORMANCE) {
         this.confirmUnlimitedMode('Switch to Unlimited Telemetry and Export', () => {
           const data = this.getTableRowData();
 
@@ -1226,7 +1227,8 @@ export default {
       });
     },
     updateTelemetryMode() {
-      this.telemetryMode = this.telemetryMode === 'unlimited' ? 'performance' : 'unlimited';
+      this.telemetryMode =
+        this.telemetryMode === MODE.UNLIMITED ? MODE.PERFORMANCE : MODE.UNLIMITED;
 
       if (this.persistModeChange) {
         this.table.configuration.setTelemetryMode(this.telemetryMode);
@@ -1236,7 +1238,7 @@ export default {
 
       const timeSystemKey = this.openmct.time.getTimeSystem().key;
 
-      if (this.telemetryMode === 'performance' && this.sortOptions.key !== timeSystemKey) {
+      if (this.telemetryMode === MODE.PERFORMANCE && this.sortOptions.key !== timeSystemKey) {
         this.openmct.notifications.info(
           'Switched to Performance Mode: Table now sorted by time for optimized efficiency.'
         );
diff --git a/src/plugins/telemetryTable/components/TableFooterIndicator.vue b/src/plugins/telemetryTable/components/TableFooterIndicator.vue
index 63d7c1db7b..b165925bb4 100644
--- a/src/plugins/telemetryTable/components/TableFooterIndicator.vue
+++ b/src/plugins/telemetryTable/components/TableFooterIndicator.vue
@@ -62,6 +62,8 @@
 <script>
 import _ from 'lodash';
 
+import { MODE } from '../constants.js';
+
 const FILTER_INDICATOR_LABEL = 'Filters:';
 const FILTER_INDICATOR_LABEL_MIXED = 'Mixed Filters:';
 const FILTER_INDICATOR_TITLE = 'Data filters are being applied to this view.';
@@ -81,7 +83,7 @@ export default {
     },
     telemetryMode: {
       type: String,
-      default: 'performance'
+      default: MODE.PERFORMANCE
     }
   },
   emits: ['telemetry-mode-change'],
@@ -103,7 +105,7 @@ export default {
       });
     },
     isUnlimitedMode() {
-      return this.telemetryMode === 'unlimited';
+      return this.telemetryMode === MODE.UNLIMITED;
     },
     label() {
       if (this.hasMixedFilters) {
diff --git a/src/plugins/telemetryTable/constants.js b/src/plugins/telemetryTable/constants.js
new file mode 100644
index 0000000000..80eec01c7b
--- /dev/null
+++ b/src/plugins/telemetryTable/constants.js
@@ -0,0 +1,11 @@
+const ORDER = {
+  ASCENDING: 'asc',
+  DESCENDING: 'desc'
+};
+
+const MODE = {
+  PERFORMANCE: 'performance',
+  UNLIMITED: 'unlimited'
+};
+
+export { MODE, ORDER };
diff --git a/src/plugins/telemetryTable/plugin.js b/src/plugins/telemetryTable/plugin.js
index 8bc34d329a..ba12c20fd3 100644
--- a/src/plugins/telemetryTable/plugin.js
+++ b/src/plugins/telemetryTable/plugin.js
@@ -20,13 +20,14 @@
  * at runtime from the About dialog for additional information.
  *****************************************************************************/
 
+import { MODE } from './constants.js';
 import TableConfigurationViewProvider from './TableConfigurationViewProvider.js';
 import getTelemetryTableType from './TelemetryTableType.js';
 import TelemetryTableViewProvider from './TelemetryTableViewProvider.js';
 import TelemetryTableViewActions from './ViewActions.js';
 
 export default function plugin(
-  options = { telemetryMode: 'performance', persistModeChange: true, rowLimit: 50 }
+  options = { telemetryMode: MODE.PERFORMANCE, persistModeChange: true, rowLimit: 50 }
 ) {
   return function install(openmct) {
     openmct.objectViews.addProvider(new TelemetryTableViewProvider(openmct, options));
diff --git a/src/plugins/telemetryTable/pluginSpec.js b/src/plugins/telemetryTable/pluginSpec.js
index bf17a4863e..f1346d7228 100644
--- a/src/plugins/telemetryTable/pluginSpec.js
+++ b/src/plugins/telemetryTable/pluginSpec.js
@@ -28,6 +28,7 @@ import {
 } from 'utils/testing';
 import { nextTick } from 'vue';
 
+import { MODE } from './constants.js';
 import TablePlugin from './plugin.js';
 
 class MockDataTransfer {
@@ -198,7 +199,7 @@ describe('the plugin', () => {
           },
           persistModeChange: true,
           rowLimit: 50,
-          telemetryMode: 'performance'
+          telemetryMode: MODE.PERFORMANCE
         }
       };
       const testTelemetry = [
diff --git a/src/ui/registries/ToolbarRegistry.js b/src/ui/registries/ToolbarRegistry.js
index 2bfa3af46e..67d971ebb6 100644
--- a/src/ui/registries/ToolbarRegistry.js
+++ b/src/ui/registries/ToolbarRegistry.js
@@ -25,65 +25,67 @@
  *
  * @interface ToolbarRegistry
  */
-export default function ToolbarRegistry() {
-  this.providers = {};
+export default class ToolbarRegistry {
+  constructor() {
+    this.providers = {};
+  }
+
+  /**
+   * Gets toolbar controls from providers which can provide a toolbar for this selection.
+   *
+   * @param {Object} selection the selection object
+   * @returns {Object[]} an array of objects defining controls for the toolbar
+   * @private for platform-internal use
+   */
+  get(selection) {
+    const providers = this.getAllProviders().filter(function (provider) {
+      return provider.forSelection(selection);
+    });
+
+    const structure = [];
+
+    providers.forEach((provider) => {
+      provider.toolbar(selection).forEach((item) => structure.push(item));
+    });
+
+    return structure;
+  }
+
+  /**
+   * @private
+   */
+  getAllProviders() {
+    return Object.values(this.providers);
+  }
+
+  /**
+   * @private
+   */
+  getByProviderKey(key) {
+    return this.providers[key];
+  }
+
+  /**
+   * Registers a new type of toolbar.
+   *
+   * @param {module:openmct.ToolbarRegistry} provider the provider for this toolbar
+   * @method addProvider
+   */
+  addProvider(provider) {
+    const key = provider.key;
+
+    if (key === undefined) {
+      throw "Toolbar providers must have a unique 'key' property defined.";
+    }
+
+    if (this.providers[key] !== undefined) {
+      console.warn("Provider already defined for key '%s'. Provider keys must be unique.", key);
+    }
+
+    this.providers[key] = provider;
+  }
 }
 
-/**
- * Gets toolbar controls from providers which can provide a toolbar for this selection.
- *
- * @param {Object} selection the selection object
- * @returns {Object[]} an array of objects defining controls for the toolbar
- * @private for platform-internal use
- */
-ToolbarRegistry.prototype.get = function (selection) {
-  const providers = this.getAllProviders().filter(function (provider) {
-    return provider.forSelection(selection);
-  });
-
-  const structure = [];
-
-  providers.forEach((provider) => {
-    provider.toolbar(selection).forEach((item) => structure.push(item));
-  });
-
-  return structure;
-};
-
-/**
- * @private
- */
-ToolbarRegistry.prototype.getAllProviders = function () {
-  return Object.values(this.providers);
-};
-
-/**
- * @private
- */
-ToolbarRegistry.prototype.getByProviderKey = function (key) {
-  return this.providers[key];
-};
-
-/**
- * Registers a new type of toolbar.
- *
- * @param {module:openmct.ToolbarRegistry} provider the provider for this toolbar
- * @method addProvider
- */
-ToolbarRegistry.prototype.addProvider = function (provider) {
-  const key = provider.key;
-
-  if (key === undefined) {
-    throw "Toolbar providers must have a unique 'key' property defined.";
-  }
-
-  if (this.providers[key] !== undefined) {
-    console.warn("Provider already defined for key '%s'. Provider keys must be unique.", key);
-  }
-
-  this.providers[key] = provider;
-};
-
 /**
  * Exposes types of toolbars in Open MCT.
  *
diff --git a/src/ui/toolbar/components/ToolbarButton.vue b/src/ui/toolbar/components/ToolbarButton.vue
index 90c2120cc5..25f63e7283 100644
--- a/src/ui/toolbar/components/ToolbarButton.vue
+++ b/src/ui/toolbar/components/ToolbarButton.vue
@@ -34,9 +34,9 @@
       }"
       @click="onClick"
     >
-      <div v-if="options.label" class="c-icon-button__label">
+      <span v-if="options.label" class="c-icon-button__label">
         {{ options.label }}
-      </div>
+      </span>
     </div>
   </div>
 </template>
diff --git a/src/ui/toolbar/components/ToolbarMenu.vue b/src/ui/toolbar/components/ToolbarMenu.vue
index 91ce5332a7..86100c806b 100644
--- a/src/ui/toolbar/components/ToolbarMenu.vue
+++ b/src/ui/toolbar/components/ToolbarMenu.vue
@@ -25,11 +25,13 @@
       class="c-icon-button c-icon-button--menu"
       :class="options.icon"
       :title="options.title"
+      :aria-label="options.label"
+      role="button"
       @click="toggle"
     >
-      <div v-if="options.label" class="c-icon-button__label">
+      <span v-if="options.label" class="c-icon-button__label">
         {{ options.label }}
-      </div>
+      </span>
     </div>
     <div v-if="open" class="c-menu" role="menu">
       <ul>