John74

That is also why Full screen mode was requested, which unfortunately is still missing.

Exactly. Some tools need the space, and they should automatically zoom out as needed. For other tasks the zoom should be as big as possible.

+1
I have also found that Affinity's Zoom to Fit doesn't zoom in enough and wastes a lot of window space.

If I need space for tools, I will reduce the zoom and make as much space as I need. The free space is not the meaning of "Zoom to Fit", which is the maximum possible display of the working area of the document to preview the work. So unnecessary space around the document only worsens the overview and control of the work.

Keep CTRL pressed when using the arrow keys and you get changes by 0.1 per keystroke.
 
Greetings

As the kids say these days, this, this and more this:
Then Ctrl+Shift to move by 0.001

Thanks for the tip. It seems like this should be the default behaviour (without having to hold a modifier key), considering that jumping between 0, 1, and 2 has (as far as I can see) no practical purpose.
@Affinity: maybe it would make more sense to jump by 0.1 with no modifier key pressed, and by 0.01 with a modifier key (like CTRL) pressed?

When in the Levels adjustment window, when the cursor is in the Gamma's number field (see attached screenshot), if the user presses the up or down arrows on the keyboard, this steps the gamma from 0 to 1 to 2, with no steps in between. I find that these are excessively large steps that have no practical use. Usually when I want to change the Gamma, it's by a few tenths or hundredths, not by 1. As a comparison, when the cursor is in the Black Level or White Level number fields, pressing the up/down arrows steps up/down by 1% at a time, which is much more granular and useful.
Can you please change how the Gamma's number field reacts to keyboard presses from the up/down arrows? Maybe adjust it by 0.1 or 0.01 for each press?

When in the Levels adjustment window, when the cursor is in the Gamma's number field (see attached screenshot), if the user presses the up or down arrows on the keyboard, this steps the gamma from 0 to 1 to 2, with no steps in between. I find that these are excessively large steps that have no practical use. Usually when I want to change the Gamma, it's by a few tenths or hundredths, not by 1. As a comparison, when the cursor is in the Black Level or White Level number fields, pressing the up/down arrows steps up/down by 1% at a time, which is much more granular and useful.
Can you please change how the Gamma's number field reacts to keyboard presses from the up/down arrows? Maybe adjust it by 0.1 or 0.01 for each press?

I have always disliked this waste of valuable space. Zoom to fit... and it doesn't actually fit. Not funny when my most used screen is 13".
Interestingly, the wasted space in your example is, proportionally, not quite as bad as what I typically experience. I don't why that should be.
@MikeTO It centres OK for me, so that's an interesting quirk. Maybe it is down to different scrollbar view settings (mine is set to "when scrolling").

I have a request regarding how the "Zoom to Fit" zoom mode works. I find that it doesn't zoom in enough. There is still a large border of empty space around the photo once you've zoomed to this level. Personally I feel that it would make more sense to make this empty border smaller, so that the size of the photo is as big as possible. I know that it is helpful to have some empty space around the photo for certain tasks, like cropping, but the amount of empty space that is currently there seems excessive to me.
I know that modifying how this zoom mode works may mess up some people's workflow, so maybe instead of changing it, could you add another zoom mode called, for example, "Zoom to Fit (tight)" that zooms to fit, but with a much smaller empty border?
I have attached two screenshots. One shows how "Zoom to Fit" currently works, with a large empty border around the photo. For the other, I have manually zoomed into the highest whole-number zoom percentage that fits the photo into the window (21% in this case). The photo is quite a bit bigger this way, which I find very handy.

When in the Levels adjustment window, when the cursor is in the Gamma's number field (see attached screenshot), if the user presses the up or down arrows on the keyboard, this steps the gamma from 0 to 1 to 2, with no steps in between. I find that these are excessively large steps that have no practical use. Usually when I want to change the Gamma, it's by a few tenths or hundredths, not by 1. As a comparison, when the cursor is in the Black Level or White Level number fields, pressing the up/down arrows steps up/down by 1% at a time, which is much more granular and useful.
Can you please change how the Gamma's number field reacts to keyboard presses from the up/down arrows? Maybe adjust it by 0.1 or 0.01 for each press?