Issues relating to the icon that appears in the notification area, aka status tray, for apps

text suggestions, font size and other text related stuff

Issues related to style and color

Wayland specific issue

Options to hide window contents when moving or resizing

WM title bar and window borders or Client Side Decorations (CSD)

Focus options found in the Focus tab of Window Manager settings app

Menu that appears when clicking the app icon in the titlebar or with Alt+Spacebar

Attributes set at the window level defined by FreeDesktop.

When changing the window scaling to a non-one value in Appearance > Settings