Function: plothsizes
Class: highlevel
Section: graphic
C-Name: plothsizes_flag
Prototype: D0,L,
Help: plothsizes({flag=0}): returns array of 6 elements: terminal width and
 height, sizes for ticks in horizontal and vertical directions, width and
 height of characters. If flag=0, sizes of ticks and characters are in
 pixels, otherwise are fractions of the screen size.
Doc: return data corresponding to the output window
 in the form of a 6-component vector: window width and height, sizes for ticks
 in horizontal and vertical directions (this is intended for the \kbd{gnuplot}
 interface and is currently not significant), width and height of characters.

 If $\fl = 0$, sizes of ticks and characters are in
 pixels, otherwise are fractions of the screen size
