Sorry for the necro post here but I figured it makes more sense for me to post here than make a new thread on the same issue. Is there any update on this? A true full screen view without the toolbars and taskbar would be great. Any news on this being implemented?
Yes, PM6 has (will have a) true full screen mode for the Preview and Contact Sheet on Windows (F11 toggles) and on macOS (Ctrl-Command-F toggles).
and is there a way to try the beta v6?
Not at this time, though we will have a public beta phase soon.
-Kirk