Canon EOS-1D X Mark III Advanced User's Manual page 824

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(1) Continuous shooting speed
(2) Limit continuous shot count
(3) Restrict drive modes
5
(1) Viewfinder info. during exp.
(2) LCD panel illumi. during Bulb
(3) Rec card, img size setting
Viewfinder Shooting
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Viewfinder Shooting
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824
: Setting disabled (do not work)
LV Shooting Movie Recording
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: Setting disabled (do not work)
LV Shooting Movie Recording
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