Canon 970 IS - Manual (Page 181)

179
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The images you shoot are automatically assigned file numbers. You
can select how the file number is assigned.
Low Level Format
We recommend you select [Low Level Format] when you think
that the recording/reading speed of a memory card has
dropped. A low level format may require 2 to 3 minutes with
some memory cards.
Resetting the File Number
Continuous
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
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.
Auto Reset
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.
* 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.
1
Select [File Numbering].
1. Press the button.
2. Use the or button to select the
menu.
3. Use the or button to select
[File Numbering].