MPlayer's main window displaying the menu, the opened movie and the player toolbar with buttons for play/pause/stop as well as volume adjusment and movie information. 

The Play menu showing the various actions available for the playing movie including playlist, forward and rewind. 

The Tools menu displaying the options for Audio track, Subtitle track as well as the possible languages for the software. 

The Options window allows you to configure the application's behaviour according to your needs and preferences.