Casio YC-400 User Manual page 73

Using Image Files Stored on the Computer's Hard Disk in a Presentation (PC Image Mode)
3.
Drag the selected thumbnail from the Windows Explorer window and
drop it at the location in the playlist where you want the image file
inserted.
This adds the image you selected in step 2 and displays its thumbnail at the location
in the playlist where you dropped it.
As a general rule, you should avoid deleting, renaming, or moving a file that is contained
in a playlist. Otherwise, PJ Camera Software will not be able to find the file when you
play the playlist, and so it will skip it.
Duplicating an Image in a Playlist
Use the following procedure to copy an image contained in a playlist and duplicate it at
another location inside the same playlist.
1.
In the playlist area, select the thumbnail of the image you want to
duplicate.
You could also select multiple files for this procedure, if you want.
2.
On the [Edit] menu, select [Copy].
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