TLDR- any way to undo or switch highlighter colors with shortcuts?

Hello, are there any important keyboard shortcuts I may be missing for the LSAT?

I have found on more than one occasion that I'll be highlighting and my mouse accidentally highlights the entire paragraph, undoing all my previous highlighting. An undo (command + z) option would be invaluable.

Similarly, I spend a decent amount of time alternating between the highlighter colors and wondering if there's a shortcut for that.

Alas I'm sure all of the tools are meant to simulate real test conditions and it's not worth it to build this if we're not going to have it during the test. But wanted to ask are there any tools or shortcuts I should be aware of for the LSAT that I may be missing?

Thanks!