Problems With Display/Help Please!

I love this game…which I purchased on Steam…but it won’t display full-screen. The entire game displays but only in about 1/4 size.
Any suggestions how I can fix this?

Here’s a fix from the devs:
Go to Sunless Sea’s install directory. If you’re using Windows, that will probably be C:\Program Files (x86)\Steam\steamapps\common\SunlessSea.
Hold the Ctrl key and click on Sunless Sea.exe. Before the game runs, you’ll be asked to choose the resolution and whether to run it in windowed mode.
Though some people had to use alt instead of Ctrl.
edited by suinicide on 8/16/2016