Hello. Merry Christmas!

The default scale step is set to 2px. ",","." works fine scaling 2px of an object. However Alt+",", Alt+"." doesn't work as expected that is scaling 1px. I looked it up in the preference for the keyboard shortcuts, but it only shows the "grow", "Double Size", "Shrink", "Halve Size". How do you scale an object by steps of 1px?

Maybe the scale settings?

That's right, but you lose the convenience of the Alt key that usually works for the small amount of the default settings.

I'm just using the . and , keys... you want to add an Alt modifier?

Oh.... You would like the Alt modified to increment in one pixel, regardless of the non-modified keys.  It does do this, but those are screen pixels.

If you would like one SVG pixel, the image needs to be scaled to 100%.

I'm talking about 100% document scale, of course. Alt modifier doesn't work for scaling 1px. ".",",""Alt+.","Alt+," all scale 2 px. Thanks for your answers, but it may be the limitation I should accept.

How about this:

Set a custom zoom key (e.g. Alt+2) for zooming 2:1 in the Preferences>Interface>Keyboard. Then, to scale by 1px: Alt+2, Alt+>.