[Make the macOS window zoom button fit to contents instead of covering the screen]

Right, exactly that behavior. But looking at your screenshot I see now why this is a bigger issue for me… I use Separated Mode, and covering the whole screen when you only need a fraction should not be the default, especially since the main use of Separated Mode is so you can fit multiple windows (from possibly multiple applications) in multiple monitors.

[Make the macOS window zoom button fit to contents instead of covering the screen]

Hey Bruce, I have been a Mac developer for 30 years, so believe me when I tell you this is doable with Apple's APIs (I think currently it is just a matter of implementing an NSWindowDelegate method).

This is also the standard Mac behavior for windows; true that it's not being pushed by Apple as much as it used to, but it is still nice. The behavior I am describing should not change the zoom (100% or whatever) of the contents of the window, but the window size itself; I am not sure that was clear in my previous post.

[Make "New View" usable when not in Separated mode]

When not in Separated mode, New View opens a second view of the document… in a tab. The whole point of using New View for me (and probably many other artists) is to be able to see the document at multiple zoom levels at the same time. The way I would prefer this to work is that it opens a new window that doesn't have the tools/palettes around it, so you can move it to a different screen; the tools selected in the first window should work on the second one, and if the first window is closed, the second one immediately gets the tools and palettes.

[Make the macOS window zoom button fit to contents instead of covering the screen]

When holding Option over the window's buttons (the traffic light colored ones, Close/Minimize/Full Screen), you can use the green button as Zoom instead of Full Screen (you can also select this from Window > Zoom menu). Problem is there is not much of a difference: yes Zoom doesn't create a new space for the window like Full Screen does, but it also does increase the window size to always cover the whole screen. Instead it should grow the window just enough to fit its contents (make scrollbars disappear, if possible), but no bigger, at the current image's zoom level.

[Turn off antialiasing]

Anti-alias on/off checkbox would be easier for sure. Current coverage map has a bug by which it doesn't affect the whole line when strokes are aligned to the inside or the outside of a shape.