A few questions after playing around with this for a bit: After making a complicated selection, doing something else, I want to go back to that selection easil

A few questions after playing around with this for a bit: After making a complicated selection, doing something else, I want to go back to that selection easily. Is there a selection history? A way to execute the last selection? I tried running a shell command that waited on input and kak hung waiting for the command to finish. is there a way to kill the command? Or better, a way to interact with the command after its running? I like it so far!