Enable BBT only for specific apps, all other show default

I want to

  • only use BBT for iMovie
  • dor all other apps show default

I tried
All Apps - Disable BBT completely
iMovie - custom config

That does not seem to work, BBT does not activate in iMovie. How can I achieve this?

Easiest, activate "hide if nothing to show", then only configure buttons for iMovie:

Alternatively use the Touch Bar Configuration after clicking on an app in the left sidebar:

Super fast reply. Much appreciated. It works.