The grid below has 6 columns:
This panel let you choose some options for the main window and the video window.
Midi In Device: Scan the devices available on the system and let you choose the one to use,
Stay on top: The main window stay always visible.
Keep ratio: Video can be resized with respect to the original ratio size.
Original size: Video is opened with the original video size. It can be resized afterwards.
Full Screen: the video is displayed in full screen mode on the current monitor.
This preview print panel is made to print the current set of keys. The column size depends on the size of the editor panel.