Separate zoom for full-screen

[demgiaredv]

Could we have a separate zoom setting for full-screen viewing? I'd like to automatically zoom images to fit the screen when in full screen mode rather than having to press / or ctrl-/ each time I go full-screen. Please could we also have editable key shortcuts? I'd love Enter to open/close full-screen mode rather than open the browser (which I personally never use)

[xnview]

do you have tried the different 'auto size mode'?