Dear Xara,
I would be much chuffed if you could expand on the timeline a little.
My idea is that two adjustable markers are introduced allowing the user to decide where they want the animation to start and to finish. This would save a tremendous amount of time on some animations.
On my latest project I spent too long deleting over 50 frames within Xtreme. With control over the start and end positions there would be no need to delete a single frame.

Thanks in advance.

Yours Anas