Functions of Buttons and Other Controls on the Canon EOS Rebel T7i/800 Camera

By Julie Adair King

Part of Canon EOS Rebel T7i/800D For Dummies Cheat Sheet

It’s great to have a map to the buttons and controls on your camera, but it’s not a lot of help if you can’t remember which button to press when (and why). So here’s a quick recap of what you can do with each button. Note: This information concentrates on features available when you shoot in the P, Tv, Av, and M exposure modes. A few features also work in other modes.

This Control . . . Performs These Functions
Mode dial Sets the exposure mode, which determines how much control you have over picture settings. For the most control, choose P, Tv, Av, or M.
Menu button Press to display and hide camera menus; rotate Main dial to cycle through menu pages.
Info button During playback, Live View photography, and Movie shooting, changes the data display. During viewfinder photography, toggles between the normal information display and an electronic level.
Live View/Movie record button Press to toggle Live View on and off. When the camera is in Movie mode, press to start and stop recording.
Exposure Compensation button In P, Tv, and Av modes, press while rotating the Main dial to apply Exposure Compensation (adjusts image brightness). In M mode, press while rotating the Main dial to adjust the aperture setting.
Q button Activates Quick Control mode, which provides fast access to shooting and playback settings. Press again to exit Quick Control mode.
Set button/cross keys During viewfinder shooting, press to access the following settings: top key, White Balance; right key, AF Operation; bottom key, Picture Style; left key, Drive mode. When choosing options from menus and other screens, use the cross keys to highlight an option and then press Set to select that option.
AF Area Selection button Press to display the AF Area Selection setting, which controls which autofocus point or zones the camera uses to set focusing distance.
ISO button Press to display a screen where you can adjust the ISO setting, which determines how sensitive the camera is to light.
DISP button During viewfinder photography, enables you to manually turn the monitor on and off.
AE Lock/FE Lock/Index/Reduce button During shooting, press to lock autoexposure (AE) or to lock flash exposure (FE). During playback, press to cycle from single-image view to index (thumbnails) view. If the displayed image or live preview is magnified, press to reduce the magnification level.
AF Point Selection/Magnify button During viewfinder photography, press to display the AF Area Selection screen. (You still must use the AF Area Selection button to change the setting.) In Playback mode, press to magnify the image on the monitor. In Live View or Movie mode, you also can magnify the display under certain circumstances.
Wi-Fi button Press to display menu screen containing options for configuring wireless connections to a computer, smartphone, or tablet.
Erase button While reviewing pictures, press to erase currently displayed or selected photos.
Playback button Toggles picture playback on and off.
Flash button Press to raise built-in flash in P, Tv, Av, and M modes. When the flash is up, press again to access flash-related menu settings.
Depth-of-Field Preview button Press to temporarily set the aperture to the selected f-stop so you can see an approximation of depth of field in the viewfinder.
Lens-release button Press to disengage the lens from the camera’s lens mount so you can remove the lens.