Custom Camera Buttons and Dials: How to Set Up

What are custom buttons and dials?

Most cameras include dedicated controls for common functions, but they also offer at least a few buttons and dials that you can program to suit your own workflow. These are often labeled 'Fn' (function) or 'AF-ON' on the body, but the rear command dial, front dial, and even the directional pad can be reassigned on many models. Customization is not limited to high-end bodies; compact cameras and even some action cams also provide a degree of programmability.

The exact set of assignable controls varies by brand and model, but the underlying idea is the same: you choose what a button or dial does, so that the camera behaves the way you think. This is part of camera ergonomics, which you can read more about in our guide to camera ergonomics.

• Function buttons: usually a small button near the shutter or on the front that you can press with your thumb or finger.
• Control dials: the front and rear dials that typically adjust aperture and shutter speed, but can also control exposure compensation or other settings.
• Directional pad or joystick: often used for moving focus points, but can be assigned to other tasks.
• Video record button: on some cameras, this can be set to a different function for stills.

Why customize your controls?

The main reason to customize is speed. When you are shooting, you often need to change settings without moving your eye from the viewfinder. A dedicated button for autofocus mode, for example, lets you switch from single to continuous AF in a moment, which can be the difference between a sharp and a missed shot.

Customization also reduces menu diving. Instead of going into the main menu to change ISO or white balance, you can assign those to a button and change them with a quick press. This becomes especially useful in fast-moving situations such as street photography, events, or wildlife. For guidance on choosing a camera with good customization, see our list of best mirrorless cameras or best DSLR cameras.

Common functions to assign

Many cameras share a similar pool of assignable functions. The most useful to assign to a button or dial are those you adjust frequently without wanting to take your eye off the scene.

The exact list depends on your camera, but the table below shows typical options and why they are useful.

How to assign functions on your camera

The process is similar across most cameras. Dive into the camera's menu, find the section labeled 'Custom Controls', 'Button Settings', or 'Custom Key Assign', depending on the brand. You will see a list of the controls you can change, often shown as a diagram. Select the control you want to alter, then choose the function from the list that appears.

Some cameras let you assign a different function for when you are shooting and when you are playing back images. For example, you might set a button to magnify images during review but to focus during shooting. This dual assignment can be set separately, often in the same menu section.

After assigning, test the setup by shooting a few frames. It is common to find that a particular button placement feels odd, so don't be afraid to revise. Changing the assignment does not affect the camera's default behavior permanently; you can always reset it later.

• Find the custom control menu in your camera's setup.
• Select the button or dial you want to change.
• Browse the list of assignable functions and choose one.
• If your camera supports it, set a different function for shooting and playback.
• Confirm and test the new behavior.

Customizing dials vs. buttons

Dials and buttons serve different purposes. Dials are great for adjusting values that need to be changed in steps, like exposure compensation or ISO, because you can turn through them quickly. Buttons are better for functions that are toggled or momentarily activated, such as switching between autofocus modes or calling up focus magnification.

Many cameras let you customize the direction of the dials as well. If you come from a different system, you might prefer one way or the other. For instance, turning the dial to the right could increase the setting or decrease it, and you can often flip that behavior in the menu.

For more on how to fine-tune exposure, see our exposure compensation guide.

Saving and recalling custom setups

Most advanced cameras include custom modes on the mode dial, often labeled C1, C2, and so on. These modes let you store a snapshot of all your settings, including custom button assignments, exposure parameters, autofocus behavior, and more. You can recall a whole setup instantly by turning the dial to the appropriate position.

This is valuable if you shoot different genres. You might have one custom mode for sports, with continuous autofocus and a fast shutter speed, and another for portraits, with eye detection and a particular picture style. Storing these setups means you do not have to re-enter many settings each time you switch. The mode dial is explained in more depth in our mode dial guide.

Tips for getting the most out of customization

Start by listing the settings you change most often during a typical shoot. Those are the best candidates for customization. Keep the assignments simple at first; you can add more later once you are comfortable.

Avoid overloading buttons with rarely used functions. A clean, intuitive setup is better than one where every button does something different. It is also worth checking the camera's manual for any hidden shortcuts, as some functions are only available through custom controls.

Finally, remember that customization is personal. What works for another photographer may not work for you. Take time to experiment, and do not be afraid to change assignments when your shooting style evolves.

What to pick for your use

Questions

Can I customize buttons on any camera?

Most interchangeable-lens cameras and many advanced compacts allow at least some button customization. Entry-level point-and-shoots often do not, but you can still find customizable controls on many mid-range models.

What are the most useful functions to assign?

ISO, white balance, autofocus mode, and exposure compensation are among the most commonly assigned. The best functions are those you change often and would otherwise have to adjust through the menu.

Will customizing my buttons affect the camera's warranty?

No, reassigning buttons or dials through the camera's menu is a standard feature and does not modify any hardware. It is a normal part of using the camera and will not void the warranty.

Can I reset my custom buttons to default?

Yes. Every camera with customizable controls includes a way to restore the default assignments, either through a reset option in the custom controls menu or by performing a full camera reset.

Do custom dials work the same as buttons?

No. Dials are best for adjusting a value across a range, while buttons are for toggles or momentary actions. Some controls can be assigned different functions depending on whether they are rotated or pressed.