Anatomy of A Plot
Trick plots multiple plots on a "page" and multiple curves on a "plot".
A "page" may have a number of plots and a "plot" may have a number of curves.
In plots:
Each plot has one or more curves.
In curves:
A curve has to be in a plot.
Each curve has exactly one X variable and one Y variable.
Or each curve may have one or more varcase (pair of X and Y variables).
Each varcase has exactly one X variable and one Y variable.
When a curve already has a variable, it can't add varcase.
When a curve already has a varcase, it can't add a variable.
In this case, the variable has to be added in the contained varcase.
Variables have their own attributes such as unit, scale factor, line style, etc.
In varcase:
A varcase is used to indicate that two or more variable names mean the same thing.
If the data for a curve can't be found for the first name, try the second and so forth.
Settings for page, plot and variables are accessed within the property notebook on the bottom right.
A DP spec may have multiple "pages".