Please excuse me if this has been answered, I just cant seem to find a soulution. I have ubuntu 17.10 dual screen. Desktop is set to extend the display onto my second monitor.
When i open Smplayer. I get the standard display window with controls, but the video will open full screen on my main screen display. There are no controls in there that I can find. I cant get it out of full screen mode. I can control the video with the smplayer window.
Shown here https://i.imgur.com/HCjQm0D.png.
In checking the forums I found the setting "Run Mplayer/mpv in its own window" But that is not checked off. My monitor aspect ratio is auto. In my video settings "Start video in full screen" is not checked off.