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{alias:bck}
h2. Name

*bck* --- Backward action of the last position in digitizing
h2. Syntax
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*bck* ; # back up the digitizing one position 

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h2. Description

Undo the last entered position in digitizing. This command is only valid in *[rcd - Read from cursor]*-mode, i.e. while digitizing with the cursor.

An alternative way to obtain the same result is to press a *d* on the keyboard when digitizing is active. Use several *d*'s to undo more points. *bck* is the command version, and is used in menus under a button like *Erase last digitized point*.

h2. See also

[acd - Append data from cursor], [rcd - Read from cursor], [cll - Close line], [d - Delete last actor], [pol col|pol - Polygon type display]
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