I'd like to take on this task

Thanks @rjwignar ! Let us know if you need any advice along the way.

For now, I've been able to extend the DrawItem() method inside timeline.cpp to gray out disabled items. The color change seems to only apply to disabled Clips though, and not disabled Tracks.

Do you know of a way to add a functional checkbox to the Inspector module while keeping the Item::_enable data member private? I tried using the _enabled accessor methods (Item::enabled() and Item::set_enabled) to somehow pass a reference of a Item::_enable to ImGui::Checkbox() but couldn't figure it out.

For now I've added the draft Pull Request above with more information.

Any update on your work @rjwignar? With the Dev Days coming up, somebody might be able to help you out get this over the finish line. 👍

@timlehr Apologies for the radio silence.
I've been occupied with various commitments the past year.
If it's alright with the Raven team, I would like one more week to work on this.

I've been able to publish a working PR that adds an Enabled checkbox to non-gap items. The PR also provides UI changes that distinguish enabled clips from disabled clips, but doesn't fulfill the stretch goal.