Shortcuts for Creating CD Markers

I cannot get these to work. Pressing I selects the insert tab, then pressing C or IC does nothing. IF and IS equally don’t seem to function. C does bound a selection with CD start and CD end.

Is there something I am not doing.

C works if there is an audio selection before.
But you’re right, the IC and I… shortcut don’t work.
However, you can change the shortcuts in the preferences, and this will work.