Wow, it turns out that the parameter you pass to "screen -r" to reconnect to a session can match its name partially.
For example, if you have a session named "cmus", to reconnect to it, instead of "screen -r cmus", you can use "screen -r c" โ which is shorter.
I've been using screen for literal decades and didn't know that โ today I removed too many trailing characters from the parameters and noticed that it still worked ๐
screen -r c
There are several suitable screens on:
13074.cgus (Detached)
19320.cmus (Detached)
Type "screen [-d] -r [pid.]tty.host" to resume one of them.
You can press the up arrow key and re-edit, but if the arrow keys are a bit far, you can just type `!-1m` and that'll connect you to cmus
These kind of things can only really be worked out by reading the GNU info pages.