Casio YC-400 User Manual page 61

Using Image Files Stored on the Computer's Hard Disk in a Presentation (PC Image Mode)
I To select a series of multiple images
1.
Click the thumbnail at one end of the range of the images you want to
select.
2.
While holding down the [Shift] key on your computer keyboard, click the
thumbnail at the other end of the range of images.
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