The overlay is in the bottom lane. The number of visible lanes is determined by the user (clicking the + button to add a new lane). If they only want one lane then they can have that. The height of the lanes would be adjustable also. - This was just a 5 minute mockup to give an alternative suggestion.
Which other DAWs currently use the single lane overlay system? I haven’t seen it before and it would be good to see how others are handling it.
I’m not sure you’d want that even in an overlay mode, it’s going to get very difficult to see what’s happening. I’d usually work with 2 or three lanes visible at a time, then if I need to edit another CC I’d switch it in one of the visible lanes. With most instruments I find I’m working with velocity, CC1, and CC11. Seeing the relationship between these 3 is very useful. Then occasionally I’ll want some pitch bend, pan, or sustain so I can just open those, make my changes, and close them again.
The problem with the buttons, as they currently are, is they are not intuitive - I know you’re not a fan of that word so let me qualify it in this context.
Ardour has a specific design language that users are familiar with.
This is an Ardour button, it triggers a single action. We all know and love it.

But this button is rogue, it’s non-standard within Ardour’s UI. It does several actions depending where you click on it and the current state of the editor.

No lane visible and click on a led - lane appears but can’t be edited
No lane visible and click on a button - lane appears and is editable
1 lane visible and editable and click on a second led - overlaid lane appears but isn’t editable
1 lane visible and editable and click on a second button - overlaid lane appears and is editable
1 lane visible but not editable and click on a second led - overlaid lane appears and neither are editable
1 lane visible but not editable and click on a second button - overlaid lane appears and is editable
I’m scared to test the combinations with more than two buttons.
The only similar button I can find on the UI is the plugins and inserts for tracks. They have a button and led, but they don’t look anything like the rest of the buttons on the UI and they live in their own little zone. They also don’t do anything when you left click on them, you have to double click.
And look at this confusing scenario where no buttons are selected/active but the controller lane is still visible.
