Canon EOS 5DS Instruction Manual page 482

Troubleshooting Guide
Display Problems
The menu screen shows fewer tabs and options.
In the <A> mode, only certain menu tabs and options are displayed.
Set the shooting mode to <d>, <s>, <f>, <a> or <F> (p.64).
Under the [9] tab, [Menu display] is set to [Display only My Menu
tab] (p.436).
The file name's first character is an underscore ("_").
Set the color space to sRGB. If Adobe RGB is set, the first character
will be an underscore (p.193).
The fourth character in the file name changes.
With [51: File name], select the camera's unique file name or the file
name registered under User setting 1 (p.196).
The file numbering does not start from 0001.
If the card already contains recorded images, the image number may
not start from 0001 (p.199).
The shooting date and time displayed is incorrect.
Check that the correct date and time are set (p.49).
Check the time zone and daylight saving time (p.49-50).
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