shortcut for commenting out current/selected lines?

[adavies42]

is there a keyboard shortcut for commenting out the current line or current selection? some internet results suggest there is (or was at one point), but i can't find it currently

[gyorokpeter]

https://github.com/bobbylight/RSyntaxTextArea/wiki/Keyboard-Shortcut-List

This shows it as Ctrl+/, however it doesn't seem to do anything.