It would be helpful to have a way to move zones 'forwards' or 'backwards' so you can change which zone appears in the background or behind other zones.
To do this at the moment, the zones need to be created in the right order, with the zone you want to be in the background created before any zone you want to overlay the background. However, when re-using or cloning previously created tasks and wanting to add a background that wasn't previously there means having to essentially start a screen from scratch.
It would be very helpful to have a way to change this after the zones have been created, for instance by being able to move a particular zone 'backwards/forwards' or possibly by being able to set a particular zone as being the background.