Weirdly it still doesn't quite do what I want. It leaves a gap around the edge of the window for some reason.
This is the biggest reason I love Linux. I can choose my own desktop, or even forsake the desktop entirely for a simpler window manager, without changing operating systems. Some are hyper focused on a tailored experience (gnome) while others let you configure to your heart's content (kde).
There's sacrifices to be made, of course, but not having to live under the oppression of Apple's beneficiary dictator designers is absolutely worth it for me.
Every MacOS app has a menu item explicitly made for this exact thing. It's often the third item in the menu:
File Edit View
But they refuse to put these viewing options under the View menu item. Why? Why would you not put these really great viewing options under View?