AGFA 307 Owner's Manual page 60

Chapter 4 Flash Details
WIRELESS / REMOTE RATIO CONTROL
In wireless / remote mode, when ratio control is selected, the output of
the off camera flash and the built-in flash combine to provide a 2:1
light ratio.
To use ratio control, press and hold the manual fill flash button, then
press the shutter-release button all the way down to take the picture.
CANCELING WIRELESS / REMOTE FLASH
1. Reattach the accessory flash to the camera.
2. Press the red-eye reduction ( flash mode button) so that "WL"
disappears from the data panel.
To cancel wireless/remote flash mode on the 3500xi separately
from the camera, first turn the flash off. Then, press the ON/OFF
button to turn the flash on and hold the button until the wireless
lamp turns off.
To cancel wireless/remote flash mode on other flash units, refer to
your flash owner's manual.