Resizing viewports in LayOut has always been slow / laggy / jumpy for me, probably due to my low end graphics hardware. The “Alt about center” modifier would be a timesaver, but it does not work on viewports for me. It works fine on drawn objects like rectangles though.
When I use the Alt key while dragging the side or corner of a viewport, it looks like it is working, showing the viewport changing size about its center … but when I release the mouse button, LayOut starts to blink, hiccup, and otherwise convulse. Several seconds later, when the seizure ends, the viewport snaps back to only be resized in one direction.
Is the “Alt about center” feature supposed to work for viewports? If so, any suggestions for making mine work would be much appreciated.