Canon EOS-1D X Mark III DSLR Camera (Body Only) - Manual (Page 92)

Menu Setting Procedure
1.
Display the menu screen.
Press the < > button to display the menu screen.
2.
Select a tab.
Each time you press the < > button, the main tab (group of
functions) will switch.
Turn the < > dial to select a secondary tab.
3.
Select an item.
Turn the < > dial to select an item, then press < >.
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