4.6. - vt select automatic drawing of PseudoGraphics
causes a plot to be drawn automatically after certain commands are executed.
vt or vt stateWith no parameters, the automatic drawing option is toggled. If
state
is
0, automatic drawing is turned off.
If
state
is
1, automatic drawing is turned on.
When the option is enabled, the PseudoGraphics
plot will be drawn whenever the
np, gd, fn, f1, f2 or
f3 commands return without an error.