Let’s say you’re using vim to select in visual mode. You hit v, then start moving to the right with l. Then, let’s say you wish to extend your selection to the left, without changing the point at the right. That is, you’re satisfied with '> but want to change '<.
How do you swap so that it is as if you started at '> and are selecting to the left, changing '<?
I have a vague recollection that I’ve seen this before, but it’s hard to google for.
Oops, amazing how posting to stackoverflow can make reading the (F) manual that much easier…