Canon EOS-1D X Instruction Manual page 106

3 Customizing AF Functions
AF status in viewfinder
The AF status indicator indicating that AF is operating can be displayed
in the viewfinder's field of view or outside the field of view.
The AF status indicator will also be displayed when you hold down the
shutter button halfway after focus is achieved or when you hold down the
<p> button.
AF Microadjustment
You can make fine adjustments for the AF's point of focus. For details,
see "Fine Adjustment of AF's Point of Focus" on the next page.
106
: Show in field of view
The AF status icon <i> is displayed in
the lower right of the viewfinder's field of
view.
: Show outside view
The <e> icon is displayed below the
focus confirmation light <o> outside the
viewfinder's field of view.