The buttons on the toolbar are as follows (from left to right):
When Jaksta Media Player is installed you have the option of assoicating it will the file types it can play. This is the default option and files that can be played with the player appear in Windows Explorer with Jaksta Media Players icon.
Playing files is then as easy as double clicking them in Windows Explorer.
You can also select Jaksta Media Player to play a file, by right clicking it in Windows Explorer and selecting Open With > Jaksta Media Player
If you open Jaksta Media Player from the Start Menu or Desktop icon then you can add files to it to play by:
To switch to full screen mode when playing a video, just double click the video. To switch back to a windowed view press the Esc key on your keyboard.
To change the playback speed of a video, right mouse click the video and select Playback > Speed