I encountered a problem with the Stretch options in Project Settings.
I change them and save them, my selection is visible and saved in the editor, but then it is not applied to the actual project.
When I hover over the Mode and Aspect options, they stay at the default values.
See the example below - Mode is set to “canvas_items”, but hovering over shows String = "keep". Same for the Aspect option.
Reopening the project, restarting the editor, restarting the scene, restarting the game and scene make no difference. Creating a new project results in the same behaviour.
The Canvas or Camera view is always restrained to the original max size and I see the dark editor background color, regardless of the Aspect option. It never resizes to a larger size. (It does shrink as expected if I make the window smaller.)
It seems to be broken in 4.4.