In the full screen mode the KPlayer window has no border and no title bar. By default it will also hide all other windows so the video area will cover your entire screen. If you have any KDE panels, they will also be hidden until you return to the normal mode.
To watch a movie in full screen in KPlayer select from the menu or just hit Ctrl+F. To go back to normal display hit Ctrl+F again or click to open the popup menu and unselect the option. Double clicking the video area also switches between full screen and normal size. Pressing Esc will stop playback and also return to normal display.
The submenu of the lets you show the click menumenu bar, toolbars, multimedia library, message log and status bar in full screen mode. KPlayer will remember your choices and show the same user interface next time you go to full screen mode.
A maximized window covers the entire screen area not used by KDE panels, and has a title and borders, as well as all the same user interface as a normal window. KPlayer will not try to resize a maximized window automatically. To maximize the KPlayer window click the button on the right side of the title bar or right click the middle portion of the title bar to get a popup menu and select the command from it. To go back to normal window size, click the button or select the command again.
When the KPlayer window is full screen or maximized, and the mouse pointer is in the video area, rolling the mouse wheel will seek, or move the playback point, forward when rolling the wheel up (away from you) or backward when rolling it down (towards you). If you hold down the Ctrl key on the keyboard, seeking will be faster.