First of all, thanks for the quick answer!
When I disable ‘Fit to window’, I only see a small portion of the screen (about a quarter). This way I have to use the scrollbars to see different parts of the screen.
My physical monitor’s resolution is 2560×1440, and my macbook’s resolution is 2560×1600, so I’d expect it to be a relatively good fit, but for some reason I only see a quarter of the screen. Do you somehow take into account the physical size of the screen? My physical monitor is 27 inch while my MacBook’s is 13 inch.