Bookmarks
These boxes are used for storing movie positions and for replaying
movie from the stored positions. They contain a read-only edit box
displaying the stored value and a toolbar with following buttons (left
to right):
- Set value - set the current movie position in the bookmark.
- Clear value - clear the bookmark.
- Seek to bookmark - seek to the stored position & pause the movie.
- Play from bookmark - play from the stored position.
- Switch frames / time - switch the units of the value.
These boxes are also used in the loop editor.