I am using the Generate Press Arctic theme and the logo is incredibly small. I have looked at what little code I can find and see nothing limiting the size of the logo. The logo file I am using is around 320 px wide, but the logo shown is a fraction of that.
the Artic Site uses the Navigation as Header function, so the logo gets its size from the Menu Item Height set in Customizer > Layout > Primary Navigation.
If you want to only increase the logo size then you can add this CSS:
Thanks for your reply. Is it possible for you to share some screenshots showing me where to make this change? I can copy/paste but I am largely unfamiliar with coding.