I have an ultra wide and DisplayFusion split it into 3 monitors, one padded. When I played iTunes movies, I usually press Shift and Maximize so that the iTunes movie window will maximized across all 3 virtual monitors. After a few seconds of playing, the window auto adjusted. It doesn't go edge to edge. It's a size of 90% of the actual physical monitor (and it is not the padded side). It seems DF is not allowing video to be played in Maximize mode.

If I click full screen at the bottom right of iTunes window, the video become full screen (such that it also hides the task bar.. video played full screen. That's nice, but my second physical monitor became blank! (this does not happen when I played video games full screen). Edit: this seems to be an iTunes issue https://www.reddit.com/r/osx/comments/17a3bm/how_has_apple_still_not_fixed_the_full_screen/

If I quit DF, I can play the iTunes movie maximized (+task bar) and it does not auto adjust.

What can I do (using DF 9.6 Steam version)? Ideally I would like to play iTunes video in maximized (and have the task bar too), not full screen.

Hi there and thanks for the tip. I put in two apps: iTunes and iTunes Helper into the Compatibility. The "Force DisplayFusion to treat this application as full screen" didn't fix it but I also checked the "Disable TitleBar Buttons (this application only) and that solved my issue. Now I can play my movies at maximized window! /fist pumping in the air!