Deprecated statements
The following statements are deprecated. they shall be abolished in future.

`PLOT x,y`
Synonymous with `PLOT LINES: x,y`
`SET AXIS COLOR` n
Change the color index that is used for built-in pictures AXES and GRID.
`ASK AXIS COLOR a`
Get the color index that is used for built-in pictures AXES and GRID.

`ASK PIXEL SIZE x, y`
Assigns the pixel width and the height of the pane reduced by 1 to x and y.
`ASK BITMAP SIZE x,y`
Assigns the pixel width and the height of the pane to x and y.