[wxMaxima] Variables wx...

wxMaxima recognizes some special variables.

wx-Variable	Possible value	Description
wxanimate_autoplay:	true or false	Automatically play animations by default?
wxanimate_framerate:	Numeric	The number of frames per second the following animations have to be played back with.
wxchangedir:	Path	On most operating systems wxMaxima automatically sets Maxima’s working directory to the directory of the current file. This allows file I/O (e.g. by read_matrix) to work without specifying the whole path to the file that has to be read or written. On Windows this feature sometimes causes error messages and therefore can be set to false from the config dialogue.
wxfilename:	Filename	This variable contains the name of the file currently opened in wxMaxima.
wxplot_pngcairo:	true or false	Tells whether wxMaxima tries to use gnuplot’s pngcairo terminal that provides more line styles and a better overall graphics quality.
wxplot_size=	[value1,value2]	Defines the resolution of embedded plots.
wxsubscripts:	true or false	Tells Maxima if it should convert variable names that contain an underscore (R_150 or the like) into subscripted variables. See wxdeclare_subscript for details which variable names are automatically converted.