Canon EOS-1D X Mark II DSLR Camera (Body Only) - Manual (Page 203)

203
The file name has four alphanumeric
characters followed by a four-digit image
number (p.206) and extension. The first
four alphanumeric characters are set
upon factory shipment and unique to the camera. However, you can
change them.
With “User setting1”, you can change and register the four characters
as desired. With “User setting2”, if you register three characters, the
fourth character from the left will be appended automatically to indicate
the image size.
1
Select [File name].
Under the [ 5 1 ] tab, select [ File
name ], then press < 0 >.
2
Select [Change User setting*].
3
Enter any alphanumeric
characters.
For User setting1, enter four
characters. For User setting2, enter
three characters.
Press the < L > button to delete any
unnecessary characters.
3
Changing the File Name
Registering or Changing the File Name
(Example)
BE3B0001.JPG
Character palette