Canon EOS Rebel T3i 18-135mm IS Lens Kit EOS REBEL T3i / EOS 600D Instruction - Page 183

3 Setting the FlashN Clear flash settings With the [Built-in flash func. setting] or [External flash func. setting] screen displayed, press the button to display the screen to clear the flash settings. When you select [OK], the settings for the flash will be cleared. Setting the External Speedlite Custom Functions The Custom Functions displayed under [External flash C.Fn setting] will vary depending on the Speedlite model. 1 Display the Custom Function. With the camera ready to shoot with an external Speedlite, select [External flash C.Fn setting], then press . 2 Set the Custom Function. Press the key to select the function number, then set the function. The procedure is the same as setting the camera's Custom Functions (p.250). To clear all the Custom Function settings, select [Clear ext. flash C.Fn set.] in step 1. 183