This frame displays a table list of expandable items. The items are either
images (which are not expandable), or QuickTime® movies which can be
expanded to show each frame of the movie.
This frame displays 6 columns, from left to right :
The up and down arrow keys move the line highlight up or down one by one.
The left and right arrow key move the line highlight up or down to the next
image where the checkbox is checked. The "home" and "end" keys move
the hilight to the first and last checked lines.
When applicable, the delete and backspace keys delete the highlighted line from
the list, and the space and return keys toggle the checkbox of the highlighted
line.