How to Change Settings on Sony a6400
If you want to move faster with the Sony a6400, the key is understanding where its most important settings live and how to access them without breaking your shooting flow.
This guide shows you how to change settings on Sony a6400 for everyday photography and video, with a focus on the controls that matter most.
Why the Sony a6400 menu feels confusing at first
The Sony a6400 is a mirrorless camera with a deep menu system, several physical controls, and a highly customizable interface.
That flexibility is useful, but it can feel overwhelming if you are coming from a simpler point-and-shoot camera or a different brand such as Canon or Nikon.
Most users do not need to memorize every menu page.
Instead, you should focus on the main settings that affect exposure, autofocus, image quality, and video behavior.
Once those are set, you can use custom buttons, the Fn menu, and My Menu to reduce time spent digging through pages.
Where to change settings on Sony a6400
You can change Sony a6400 settings in four main places:
- Main menu for deeper camera configuration
- Fn menu for quick-access shooting controls
- Control wheel and buttons for direct changes
- My Menu for saved shortcuts to your most-used options
The camera also lets you assign functions to custom buttons, which is one of the best ways to make the a6400 easier to use in real shooting situations.
How to change basic shooting settings
Basic settings include exposure mode, ISO, shutter speed, aperture, and white balance.
These are the first settings to check before you begin photographing a scene.
Change exposure mode
To change the exposure mode, turn the mode dial on the top of the camera.
Common options include:
- P for Program Auto
- A for Aperture Priority
- S for Shutter Priority
- M for Manual Exposure
- Auto or Scene modes for simplified operation
Aperture Priority is popular for portraits and general photography because it lets you control depth of field while the camera handles shutter speed.
Manual mode is useful when lighting is consistent and you want full control.
Adjust ISO
Press the ISO button or assign ISO to a custom button if needed.
Then use the control wheel to select the sensitivity value.
Lower ISO values such as 100 or 200 usually give cleaner images, while higher values help in low light but can add noise.
Change shutter speed and aperture
In Manual mode, use the control dials to change shutter speed and aperture.
In Aperture Priority or Shutter Priority, the camera manages one part of the exposure while you control the other.
The exact control behavior can depend on your button assignments and shooting mode, so it is worth checking how your a6400 is configured.
Set white balance
White balance adjusts color temperature so whites look neutral under different lighting.
You can choose presets such as Daylight, Cloudy, Incandescent, or Fluorescent, or use custom white balance for more accurate color.
How to change autofocus settings on Sony a6400
The autofocus system is one of the strongest features of the Sony a6400, especially for tracking faces, eyes, and moving subjects.
If your images are not focusing the way you expect, the autofocus settings are often the reason.
Change AF mode
AF mode controls how the camera focuses:
- AF-S for stationary subjects
- AF-C for moving subjects
- DMF for direct manual focus after autofocus
- MF for full manual focusing
Use AF-S for still subjects like landscapes or product shots.
Use AF-C for sports, children, pets, and any subject that moves unpredictably.
Change focus area
The focus area determines where the camera is allowed to focus.
Common choices include Wide, Zone, Center, Flexible Spot, and Expand Flexible Spot.
Wide works well for general use, while Flexible Spot gives you more control over exactly where focus lands.
Enable face and eye detection
Face and eye detection can be especially useful for portraits and video.
On the Sony a6400, Eye AF is a major advantage because it can lock onto a subject’s eye and maintain sharp focus more reliably than older autofocus systems.
To improve portrait autofocus, check that face detection is enabled and that your focus area is not too restrictive.
If the camera struggles, try AF-C with a wider focus area.
How to change image quality and file settings
If you want better control over storage and editing flexibility, image quality settings matter as much as exposure settings.
Change file format
You can choose between JPEG, RAW, or RAW plus JPEG.
JPEG files are smaller and ready to share, while RAW files preserve more detail for editing in Adobe Lightroom, Capture One, or similar software.
RAW plus JPEG gives you both options but uses more card space.
Adjust image size and aspect ratio
The a6400 allows you to change image size and aspect ratio depending on how you plan to use the photo.
Most photographers keep the full sensor aspect ratio for maximum detail, then crop later if needed.
Set drive mode
Drive mode changes how the camera captures images:
- Single shooting for one frame at a time
- Continuous shooting for bursts
- Self-timer for tripod work and self-portraits
- Bracketing for exposure variation
Continuous shooting is useful for action or wildlife, while self-timer reduces shake for long exposures.
How to change video settings on Sony a6400
Video settings on the Sony a6400 deserve special attention because they affect resolution, frame rate, color, and autofocus behavior.
If you shoot YouTube content, interviews, or b-roll, the right setup can save time in post-production.
Choose resolution and frame rate
Common video choices include 4K and Full HD, with frame rates such as 24p, 30p, or 60p.
Many creators use 4K for sharper detail and Full HD for smaller file sizes or higher frame rates.
Match your frame rate to your intended look.
For a cinematic appearance, 24p is common.
For smoother motion or social media content, 30p or 60p may be more practical.
Adjust movie autofocus behavior
The Sony a6400 offers reliable continuous autofocus in video, but you may want to fine-tune AF transition speed and subject shift sensitivity.
Slower transitions can look more cinematic, while faster settings can keep up with moving subjects.
Check audio settings
Audio is often overlooked, but the a6400 lets you monitor and manage recording levels.
If you are using an external microphone, verify that the correct input is active and test the levels before recording important footage.
How to customize the Fn menu and buttons
Customizing controls is one of the fastest ways to learn how to change settings on Sony a6400 efficiently.
The goal is to reduce the number of steps needed for the settings you use most often.
Set up the Fn menu
The Fn menu is a shortcut panel that gives you quick access to common settings like ISO, focus area, white balance, drive mode, and metering mode.
You can customize which functions appear there through the camera menu.
Assign custom buttons
The Sony a6400 supports button customization, letting you assign functions such as:
- Eye AF
- ISO
- White balance
- Focus area
- Metering mode
- Silent shooting
Assigning Eye AF to a convenient button is especially useful for portrait photographers.
Many users also place ISO or focus area on a button they can reach without taking the camera from their eye.
Use My Menu
My Menu lets you save frequently used options in one place.
This is ideal for settings you do not need every minute but still change regularly, such as card format, display brightness, or file format.
How to reset or save settings on the Sony a6400
If the camera behaves unexpectedly, you may want to restore defaults or save a known-good setup.
Sony cameras can retain customized settings, which is helpful until you inherit a configuration you do not understand.
Before resetting, note your current setup or take photos of the menu pages you have customized.
That makes it easier to rebuild your preferred configuration later.
If you often shoot different types of work, consider creating a repeatable setup for each scenario: stills, video, low light, and action.
This reduces mistakes and makes the a6400 faster to use in real-world conditions.
Best settings to check first on a Sony a6400
If you only want the essentials, start with these core adjustments:
- Exposure mode: Aperture Priority or Manual
- ISO: Auto ISO with a sensible maximum
- AF mode: AF-C for motion, AF-S for still subjects
- Focus area: Flexible Spot or Wide
- File format: RAW for editing, JPEG for quick sharing
- Drive mode: Single or Continuous depending on the subject
- Video frame rate: 24p, 30p, or 60p based on output
Once these are set correctly, the Sony a6400 becomes much easier to operate and much more consistent in practice.