Zooming in and out smoothly by little steps (1 %, 2 %, 3 %, etc.) in fullscreen mode by wheeling the mouse wheel?

[Elk]

Difficult then, I would test the mouse wheel in other applications, and if necessary try to obtain another mouse.

I use the wheel all the time, so actuaily I cannot imagine it does not work properly.

In the View menu you have zoom options using keyboard + and - which might be worth testing, and as they should use the same zoom settings might provide a temporary solution

Yes, I had tried them but always the same step wide no matter what I enter in the settings. I cannot see any difference.

[cday]

I use the wheel all the time, so actually I cannot imagine it does not work properly.

In the View menu you have zoom options using keyboard + and - which might be worth testing, and as they should use the same zoom settings might provide a temporary solution

Yes, I had tried them but always the same step wide no matter what I enter in the settings. I cannot see any difference.

So maybe a bug, which XnView MP version are you using?

[Elk]

It is really the one I posted.

[cday]

It is really the one I posted.

All right, I've scrolled through your posts, I would suggest filing a separate bug report giving the version and simple steps to reproduce the issue.

[Elk]

OK, thank you very much for your great help!