This seems like a good place to note the "center window" keybinding for windows that don't fit well in the screen (e.g., 2/3 wide pane next to 2/3 wide pane, or 1/3 pane on the right end of the stack next to a full-screen pane).
Vastly preferable to having to look at the edge of the screen.
Vastly preferable to having to look at the edge of the screen.