GA Plot Objects are IDL routines for creating plots commonly desired by Fusion researchers using IDL Plot Objects. They are used in ReviewPlus and EFITviewer at General Atomics, C-MOD, and PPPL, and DbAccess at PPPL.
Official documentation on the GA Plotting Object routines can be found at GA (login required). There is also some web-based help included in the documentation on user-written routines used at PPPL. See the routines starting with GA.
The simpleexample.pro code can be considered to be a quick tutorial.
Properties to plot objects can be set with calls to SET_DATA_PROPERTY or SET_PLOT_PROPERTY, depending on whether the properperty relates to a display property or something more inherint in the data itself. For example, SET_DATA_PROPERTY handles data points selection, editing and properties, while SET_PLOT_PROPERTY handles data selection, plot properties and zooming
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