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Editing
The following mnemonics are used to control various editing operations in both
text-based and GUI display environments:
'BT' Begin Type-Ahead Mode
'CE' Clear from Cursor to End of Screen
GUI Display/Printer
The following mnemonics are used in both graphical environments -- they can be
sent to a graphical print spooling system (i.e., *WINPRT*), or as output to a screen:
'CP' Condense Print for Screen
Note: In Windows, the 'FILL', 'FONT', 'PEN', and 'PICTURE' mnemonics use Graphical
Device Interface (GDI) resources/handles that are only released when the window
they are in is dropped or cleared, or their 'IMAGE' group is deleted.