AMOSi:Gr Writing

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an example can be found on AMOSPro_Examples:Examples/H-0/Help_9.AMOS

Gives a choice of several alternative GRaphics WRITING modes.

Gr Writing bitpattern

Bit 0

=0, only the graphics set to the current ink colour will be drawn.
=1, new images will completely replace existing images. This is the normal setting.

Bit 1

=1, new images will be combined with existing images.

Bit 2

=1, all new images will be drawn in "inverse video", which means that
the current ink colour will appear as the current paper colour and vice versa.