Syntax: MarkVert [0|1]
Abbreviation: MV
is the same as Mark, but the region manipulated by the
cut/paste commands is the rectangle having as vertices the cursor and the mark.
If you invoke MarkVert with no arguments, it will set the mark. If you
specify 0 or 1, the mark will be cancelled or set to the current position,
respectively. Moreover, a capital ‘V’, rather than a capital ‘M’,
will appear on the status bar.
For example, if you have the following text:
aaaBbbccc aaabbbccc aaabbbCcc
and you set a vertical mark at ‘B’ then move the cursor to ‘C’, you can cut or copy all of the ‘B’s.
If you have made a vertical cut or copy, it’s very likely you will want to
use PasteVert rather than the usual Paste to reinsert the text
in a rectangle. See PasteVert.