I saw this yesterday:

The reason for the large padding was to enable zooming in, then out again to stay on a stable spot in the score.

This PR removes all of the padding, breaking this UX feature. So I started thinking about ways to remove the extra padding, or make the extra padding less intrusive while still keeping this UX feature. I came up with 2 ideas:

1. Only allow the user to see the padding when they zoom in and out, while still constraining so that there is minimal padding the canvas when the user scrolls and pans around the canvas

2. Move the mouse cursor so that it still hovers over the same part of the canvas even when that part is at a different position relative to the screen:

   2025-05-26.15-32-05.mp4

@Tantacrul what do you think of these 2 ideas?

It seems to zoom fine for me, although I'm just testing on trackpad.

The old version allowed too much space, which felt a bit silly, although I find the very tight spacing in this PR to be a little restrictive. It's very much a 'feeling' thing.

How about allowing a little more max space, like this?

@Tantacrul I've updated the code to allow 30% extra space when zooming in and out, but constrain the canvas to have a very small amount of extra space when panning. Is this good?

@godalming123 - as far as I can tell, it's exactly the same. There's far too tight a space around the score when zoomed in. Why do we want to do this? It feels restrictive for no purpose I can discern.

@Tantacrul

As far as I can tell, it's exactly the same.

There should be extra space when you zoom in with your cursor outside the score:
https://github.com/user-attachments/assets/26a0cbff-5eef-4ac6-a013-bdb0396d82ec

Why do we want to do this? It feels restrictive for no purpose I can discern.

I don't want to have extra space when panning so that in the future I can add a feature where when there is no vertical scroll space and you use the scroll wheel, muse score can scroll horizontally without you having to press shift. This feature would be incredibly useful for continuous view.

There's no value in zooming on a blank space. It's just too tight.

I don't understand why it needs to be so tight or what value that brings. Just make it far less tight.

@Tantacrul Do you agree with the removal of the Limit scroll area to page borders preference from Preferences > Canvas?