It would be good to have a way to keep walls, slabs, roofs etc, at square angles when using marquee to stretch. If you get the marquee through the wrong spot you may end up having a wall or slab at 163.41 degrees.
Make sure you have both end points of the straight edge of the element inside the marquee. If one of the end points is outside then it will not move and you will get elements on angles.
Use the irregular shaped marquee if needed.
One of the forum moderators. Versions 6.5 to 25 Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10 Dell Precision 3510 - i7 6820HQ @ 2.70GHz, 16GB RAM, AMD FirePro W5130M, Windows 10