Canon EOS-1D X Mark III Advanced User's Manual page 880

Rename tab
You can rename the My Menu tab from [MY MENU*].
1.
Select [Rename tab].
2.
Enter text.
3.
Confirm input.
To delete single characters, select [
Use the < > or <
< > to enter it.
By selecting [ ], you can change the input mode.
Press the <
> dial to select a character, then press
> button, then select [OK].
880
] or press the < > button.