Canon 814XL-S - Manual (Page 120)

REMOTE CONTROL
A remote control switch can be used for filming
when you yourself want to be at a distance from
the camera, such as when filming wild animals.
The remote control switch is plugged into the
REMOTE jack and controls the filming action of
the camera in the same manner as does the shut­
ter release lever. The camera's R/RL switch is to
be set to the R (running) position. When used
with the remote control switch, the viewfinder
exposure indicator will not work; however, the
exposure can be checked by pushing the shutter
release lever half-way, as the shutter release
lever still operates normally even with the remote
control switch plugged in. If the film jams while
filming by remote control, the film jam warning
will appear only momentarily in the viewfinder.