Actually, the dopesheet needs more icons and a side panel to handle layers without using the properties panel that can be used for other tasks as Vertex Colors.
This has been a long requested feature by artists.
This is the change we have been testing.
- Add new Opacity slider.
- Add Blend icon.
- Add Onion icon.
- Add Buttons in header for moving up/down and create/delete layers.
- Side panel with all layer properties.
As the number of buttons are limited by Dopesheet core design and we cannot change it, I have used slider section to display all new controls. Also, the show sliders option was set to true by default in 2D template.
Note: I have done and tested all changes in greasepencil-object branch before.