Any chance you could bring down the size of the screenshots you take? Most people don't have huge screens like you do, so I feel like I'm not seeing the typical UX.
For instance, a lot of the buttons on these screens are very extremely pushed to the side when they're in the corners. Look at the Shopify one specifically.
And while yes, some users will have screens that huge and designers will have to deal with that edge case, I feel it's too atypical to use for a typical user's experience.
I actually just got an email with this question yesterday, as well! Going full-screen gives me extra screen space to tack on the annotations without covering other parts of the interface up, but I agree that sometimes things spill over. I could try letterboxing it and seeing where that leads -- thanks for the feedback. In general, though, I also wish more teams had a simple "max width: 1400px;" declaration!
For instance, a lot of the buttons on these screens are very extremely pushed to the side when they're in the corners. Look at the Shopify one specifically.
And while yes, some users will have screens that huge and designers will have to deal with that edge case, I feel it's too atypical to use for a typical user's experience.