The marker area takes up a lot of vertical space, and often you don't need to see it in every animation editor.
We should add an option to Show/Hide the marker area, inside each animation editor.
- Rename Show Marker Lines to Show Markers
- If Show Markers = True, then it should work as today
- if Show Markers = False, then both the marker area, markers and marker lines should never be visible, in the current editor
Suggested by user Alumx

