Canon PowerShot A75 PowerShot A75 Camera User Guide - Page 116

Various Functions Resetting the File Number Select the set up method for the file number. The camera resets the file number to 100-0001 each time you insert a new On (unused) CF card. If you insert a card that already contains some images, numbering resumes from the next available number. The camera remembers the last file Off number, and starts numbering from the next number when you insert a new CF card. 1 In the [ (Set up)] menu, select (File No. Reset). z See Selecting Menus and Settings (p. 65). 2 Press or to select [On] or [Off]. 3 Press the MENU button. 114 Setting the File No. Reset to [Off] is useful for avoiding file name duplication when images are downloaded to a computer. About File and Folder Numbers Images are assigned file numbers from 0001 to 9900, and folders are assigned folder numbers from 100 to 998 (Folder numbers cannot contain 99 in the last two digits). Folder numbers cannot contain 99 in the last two digits.