Canon EOS-1 DX Mark III Advanced User's Manual page 439

3.
Specify the part to be edited out.
Select either [
Press <
pressing the multi-controller to fast rewind or fast forward frames. Each
turn of the <
After deciding which part to edit out, press <
by a line at the bottom of the screen will remain.
4.
Check the edited movie.
Select [
To change the edited part, go back to step 3.
To cancel the editing, press the <
] (Cut beginning) or [
> left or right to go back or forward one frame. Keep
> dial goes back or forward one frame.
] to play back the edited movie.
439
] (Cut end).
>. The portion indicated
> button.