Canon EOS 90D DSLR Camera with 18-135mm Lens - Manual (Page 266)

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Lens Electronic MF Settings
For EF, or EF-S lenses equipped with electronic manual focusing, you can
specify how manual focus adjustment is used with One-Shot AF.
1 Select [ z : Lens electronic MF].
2 Select an item.
 Disable after One-Shot AF
Manual focus adjustment after the AF operation is disabled.
 Enable after One-Shot AF
You can manually adjust the focus after the AF operation if you keep
holding down the shutter button halfway.
o For details on your lens’s manual focus specifi cations, refer to the lens
instruction manual.