I have a Macbook Pro Mid 2012 and I use it together with a Dell 24" Monitor, which has 2.560 x 1.440 pixels (WQHD).
When I use this monitor together with my Windows PC, I'm using a scaling of 125% to increase everything (e.g. GUI elements, font, etc.) to a proper size. Screenshot of the corresponding options in settings:
Unfortunately there doesn't seem to be an equivalent setting option on my Macbook. All I can do is to change the output resolution for the external display. When I choose the native resolution 2560 x 1440 everything is of course quite small. When I choose for example 1080p everything has a proper size for me, but it is blurry.
Is there any possibility to have something like "windows scaling" on my MacBook Pro Mid 2012, or is there any 3rd party App which adds this functionality?