Canon EOS-1D X Mark II DSLR Camera (Body Only) - Manual (Page 469)

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3 Registering My Menu
You can select [ Menu display ] to set the
menu screen that is to appear first when
you press the <
M > button.
Normal display
Displays the last displayed menu screen.
Display from My Menu tab
Displays with the [ 9 ] tab selected.
Display only My Menu tab
Only the [ 9 ] tab is displayed. (The z , 2 , 3 , 5 , and 8 tabs will
not be displayed.)
Menu Display Settings