| Description |
The 'F+' and
'F-' mnemonics are used to control the automatic
background filling of fonted text and the text regions
portions of check boxes and radio buttons. When the filling is disabled by
issuing a PRINT 'F-', the background region for the text
will not be erased before outputting the text. If the
colour of the background region does not match that of
the screen, the erase will still be performed. The
primary use of these mnemonics is to allow for the
generation and output of background images on screen.
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