Canon POWERSHOT SX100 IS User Manual page 64

Various Shooting Methods 1131
_ Resetting the File Number []_
See Functions Avai/ab/e in Each Shooting Mode (p. 222).
The images you shoot are automatically assigned file numbers. You
can select how the file number is assigned.
A number one higher than the last one recorded is assigned
to the next image. This is convenient for managing all your
images together on a computer because you avoid file name
Continuous duplication when changing folders or memory cards.*
* When a blank memory card is used. If a memory card with recorded
data is used, the 7-digit number for the last recorded folder and
image is compared with the last one on the memory card, and the
larger of the two is utilized as the basis for new images.
The image and folder number are reset to the starting value
(100-0001).* This is convenient for managing images on a
folder-by-folder basis.
Auto Reset * When a blank memory card is used. If a memory card with recorded
data is used, the number following the 7-digit number for the last
recorded folder and image on the memory card is utilized as the
basis for new images.