mouse wheel zooming is off-center
When using ALT+Mouse Wheel to zoom in and out on an area of the timeline, the expected behavior is to zoom where the mouse cursor is currently pointed (at least, this is how it worked when I used Premiere Pro). However, Rush zooms too far to the right of the mouse cursor.
I find I have to compensate by pointing the mouse cursor far left of where I want to actually zoom.
See screenshot for illustration: If I want to mouse-wheel zoom in on the blue timeline cursor, I have put my mouse where the mouse cursor is in the screenshot. It's off-center from where I actually want to zoom. If I place the mouse on the blue timeline cursor and try to zoom in, it will zoom in far to the right instead.
Just in case it has anything to do with it, I am using a 5K display (iMac running Windows 10), at 5120x2880, scaled to 225% in Windows scaling options.