Canon EOS Rebel XS User Manual - Page 158

3 Custom Function SettingsN C.Fn IV: Operation/Others C.Fn-9 Shutter/AE lock button 0: AF/AE lock 1: AE lock/AF Convenient when you want to focus and meter separately. Press the button to autofocus and press the shutter button halfway to attain AE lock. 2: AF/AF lock, no AE lock In the AI Servo AF mode, you can press the button to stop the AF operation momentarily. This prevents the AF from being thrown off by any obstacle passing between the camera and subject. The exposure is set at the moment the picture is taken. 3: AE/AF, no AE lock This is useful for subjects which keep moving and stopping repeatedly. In the AI Servo AF mode, you can press the button to start or stop the AI Servo AF operation. The exposure is set at the moment the picture is taken. Thus, the optimum focusing and exposure will always be achieved as you wait for the decisive moment. C.Fn-10 SET button when shooting You can assign a frequently-used function to . When the camera is ready to shoot, you can press . 0: LCD monitor On/Off Gives the same function as the button. 1: Change quality After pressing , look at the LCD monitor and press the key to set the image-recording quality directly. 2: Flash exposure compensation When you press , the flash exposure compensation screen appears so you can quickly change the setting. 3: Menu display Gives the same function as the button. 4: Disabled 158