Question

I'd like the swing marker to properly display the swing applied and have other 8th/16th style added, exemple below.

Answer 1

Thanks for the idea - you can add Swing in both Notion and Progression - with Shift+G. Keep pressing Shift+G to toggle between swung 8ths or 16ths and straight, and whether it's one staff or the whole score that should be swung. Once the marking is in the score, you can click it, and adjust how much swing to playback with.

If you idea is to add a visual element to Swing selection, please post in the Notion Feature Requests area, where other users can see it and upvote it!
-Chris