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Concepts

mark
The "other" standard position in the document, which is used for commands which need two coordinates.
point or current position
The position where text is entered. The current position can be moved using arrow keys, the mouse and other methods.
block
The block is a rectangular area which is displayed in inverse. It is used for commands which operate on a whole stretch of text.

Ulric Eriksson - February 1997 - ulric@siag.nu