Zooming in and out is a bit off. It should be changed like this:


You can keep the factor at 1.3 if you want, but that's a bit too quick for my tastes.

Personal preferences are not bugs ;) I guess it'd be nice to have a big stepped zoom and a small stepped zoom (maybe shift + mouse wheel), though.

Or a slider in the preferences dialog to adjust the speed.

Nah, the bug is not in that he prefers a smaller factor, the bug is this:

Zoom-in factor: 1+x
Zoom-out factor: 1-x
That's not how inverses are made!

You start with a zoom factor of 1. Let's say you zoom in one tic. Zoom factor is now 1.3 * 1, so 1.3. Now you zoom out one tic. Zoom factor is 0.7 * 1.3, so 0.91. Which is not the same as 1...

Zoom-out factor ought to be 1/zoom-in factor, so that the factors remain consistent. So if zoom-in uses 1.3, then zoom-out ought to be 1/1.3.

(I'd suggest a zoom-in factor of 1.25, this way the zoom-out factor is 0.8, and there are no risk of inaccuracies creeping up from loss of precision.)

I propose the following patch (see attachment).

It adds a slider to the preferences menu:



Range is from 10% to 100%, default is 30%. The math fix is included, of course.

Added.