Multicam - mouse not changing to Blade
I've set up a multicam edit, I have it in the project timeline (see screenshot). When I go to cut to different angles, the mouse stays as a pointer and does not change to blade. I've tried to look up other answers in this Community and several people have said what is wrong, but no one has said how to fix it. So, if I have something wrong, please tell me how to fix it. :) Thanks!
MacBook Pro 13″, macOS 10.15