To turn off exposure on your iPhone, follow these steps:
1. Open the camera app on your iPhone.
2. Tap on the screen to focus on the subject you want to capture.
3. Once the focus is set, you'll see a yellow square or sun icon next to the focus point.
4. To adjust the exposure, swipe up or down on the screen. Swipe up to increase the exposure, making the image brighter. Swipe down to decrease the exposure, making the image darker.
5. As you swipe, you'll notice a sun icon appearing on the screen, indicating the exposure level. Move your finger up or down until you achieve the desired exposure level.
6. Once you're satisfied with the exposure, tap the shutter button to capture the photo.
It's important to note that turning off exposure on an iPhone might not be possible as exposure control is an essential feature for capturing well-exposed photos in various lighting conditions. However, by following the steps above, you can manually adjust the exposure to achieve the desired brightness or darkness for your photos.