I have a lot of selections hanging around. How do I reduce them to a single one?

Question

After any Kakoune operation which results in multiple selections (like a global search with %s, for example), I get multiple selections and when move up and down or left or right they all move.

How do I get back to having just my primary single selection?

Answer 1

I had to ask on #kakoune @ freenode IRC, the answer is simply space.

Answer 2

Since Kakoune 2022.10.31 it is ,, not <space> anymore.