command to lock/unlock audio and video tracks

Under TIMELINE, is the command to lock/unlock video and audio tracks. The command to lock/unlock all audio tracks is "option/shift/F9" but it doesn't work. Is there something I have to do to my keyboard to make that happen. Additionally, there is no command for locking/unlocking the video tracks. In the older version, there was a command that worked for both audio and video. I was using a macbook pro at that time and not the studio version of DR. . Now I am using a separate keyboard, a mac mini and the studio version of DR. Any advice?

It may well be a keyboard setting as in Windows the commands work. I seem to remember being able to lock both video and audio with a single command in previous versions.

I find these shortcuts working for both Video and Audio (albeit separately) in Studio 20b1 for Windows.

So you are saying that they probably dont work on a Mac. Oh darn!

Hold down the Fn key as well and you should be good!

my keyboard.jpeg (674.83 KiB) Viewed 471 times

I don't have an Fn key. This is my keyboard - see attachment.

I have the Fn key where your globe key is. Maybe it’ll work.

Thanks for the tip. This actually worked for the audio tracks. selecting world key/option/shift/F9 selects and deselects all the audio tracks at the same time - very useful. However if I try to use commands to select or deselect the video tracks, there is no command indicated when I go to "timeline/Lock tracks". Is this just an error in the program? There should be commands indicating how to control the video tracks, just like there are commands to control the audio tracks.