I exactly understand what you mean. I can see why this might be useful too.

Before 91.0 came out, I spent 1-2 weeks working on the drawing code. We realized while working on TPTMP that the code was extremely inconsistent and buggy. Some of the drawing code was terrible and didn't make any sense. Most of the bugs weren't easy to notice at 60fps, but it was doing a lot of weird things like drawing lines twice, drawing back to a point you already went to, and others. Then when you considered line handling, zoom handling, and stamp handling, it was a mess. There were some bugs that let you keep a shift-drag cursor while not pressing on the mouse.

At first I tried to make it useful, allowing you to place and remove a zoom window while creating lines (this was something I intentionally tested and tried to keep in). I also tried allowing doing other things like placing stamps at the same time. But in the end it was easiest and more consistent to just have some zoom and stamp actions cancel every other action / not be allowed while doing other actions.

I'm usually able to be pretty accurate, by placing a zoom window beforehand on one side. Hopefully you can make it work.

@ajloveslily (View Post)
You might be thinking of the other bug where lines would continue outside of the zoom window and create a massive line across your screen. That was a separate fix.