Media files tab is intended for viewing downloaded media files. Two modes are possible: list view and thumbnail view. You can switch these modes by the button "Change Media Files View" in the main tool bar.
Media files toolbar buttons:
"Previous media file (BackSpace)" shows previous media file in media files list.
"Next media file (Space)" shows next media file in media files list.
"Best fit" view the picture as the best fit for your window.
"Actual size" view the picture in full size.
"Toggle fullscreen" toggle fullscreen and windowed mode of showing media files.
"Zoom in" increase the picture preview size.
"Zoom out" decrease the picture preview size.
"Delete" removes current media file from media files list and hard disk.
"Print" shows print dialog for printing current picture.
"Copy to" copy current media file to specified location.
"Open media file in another program" Open media file in another viewer, installed on your computer.
"Open media file folder" opens folder which contain current media file.
"Set as wallpaper" set picture as desktop wallpaper.