This extension has been used in many Fusion games, including one of my favorite puzzle games ever, Baba Is You
Make Clickteam Fusion
games in fullscreen without changing the resolution
mode, while maintaining aspect ratio. Your game can be any resolution. Widescreen games are displayed in letterbox on normal screens,
and non-widescreen games are displayed with black bars on the sides. Pixels are crisp and not anti-aliased.
There are also options for pixel-perfect scaling (integer-only scale), Hor+ and Vert- widescreen, and manual control of the game rectangle.
Included is an example showing off the capabilities of the object.
Open-source and HWA compatible.
To install the extension, find the Extensions
folders in your Fusion directory. The Ultimate Fullscreen extension
ZIP has corresponding extension files which you should copy over from its Extensions and Data/Runtime folders to the respective folders in your
Fusion directory. Restart Fusion and you should be able to use UFS in both the Editor and Standalone.