Like most people I was confused when the game launched at a tiny resolution in Windowed mode without the ability to toggle full screen.

After some playing around I've discovered this seems to be because the game hasn't been configured correctly to utilize 1440p (and presumably 4k too) resolutions correctly by default. The key mapping also isn't explained anywhere.

If you start in Windowed mode or you're having troubles with resolution, you can use the following keys.

* F1 - Brings up a game properties menu with a Full Screen toggle and an anti-flicker option. You can also reconfigure your key bindings here.
* F5 - Toggle between fullscreen and windowed mode instantly.
* F6 - Toggle between resolution selections.
* F12 - Unknown, but due to an RPG Maker menu cursor script[www.aldorlea.org] being used which can crash the game before triggering Steams screenshot overlay.

You can also browse to C:\Program Files (x86)\Steam\steamapps\common\Secret Of Magia and open Game.ini. Edit and save Fullscreen=1 if it isn't already set.