I am a new user (v 2.2.4).
Please add a Keyboard shortcut to move "To Front" or "To Back" of timeline.
Thanks for your feature request to have this function as a keyboard shortcut in a future release.
In the meantime, you can do this by right clicking on the image in the time line (options are move 'back', 'forward', 'to start' or 'to end').
Thanks, Daniel. Your tip is very useful. Now, if it just worked on more than one image at a time. :)