Hey, pretty new to penpot, enjoying it so far!
I am not sure if this affects me more as a primary developer vs. primary designer or if you just get used to it over time, but using penpot (and other tools before) I always lose the feel for proportions of a design and how a design board would actually translate to the browser view. I think being able to freely zoom in and out and having to work in less than 100% zoom if I want to see a fullscreen desktop design somehow disassociates me form seeing it as what is it and my designs become chunky, fonts too big, etc.
I think what would be helpful for me would being able to select a board and open a preview monitor for it in a way that It looks as if it was a website, that I can have opened on a second screen and have it stay in sync with what I do in the design view. So basically an extended or differently configured view mode.
Currently the chrome around the view mode views is enough to throw me off and having to refresh the window on every change is cumbersome. Additionally it would be reaally helpful if the board dimensions in an assumed preview monitor would adapt to the browser dimensions, both for staying in the vision of having it look like an actual website and for quick responsiveness checks without having to adjust the actual board dimensions in the design view.