If the photo has any areas that should be neutral (gray, white, or black - not beige, ivory, etc.), tap the photo in one of those areas. If the area is too small to easily tap with your fingertip, double tap first to zoom in. You can repeat this process, tapping multiple areas at different lightness levels for the best results.

If the photo doesn't have any neutral areas, just tap the Auto Fix button to automatically correct the exposure.

Sliders

Use the sliders to fine tune the automatic correction or to create special effects.

The black and white point sliders control the lightness range. Set the black point below zero for less black (making dark colors lighter) and above zero for more black (making dark colors darker). Set the white point above 100 for less white (making light colors darker) and less than 100 for more white (making light colors lighter).

Use the brightness slider to adjust the overall brightness, the shadow slider to adjust the brightness of the shadows, and the highlight slider to adjust the brightness of the highlights.

You can adjust the overall color balance of the image with the temperature and tint sliders. Use the temperature slider to make the image warmer (more orange) or cooler (more blue). The tint slider can be helpful correcting skin tones (like a TV tint control), adding magenta or green to the image.

The contrast slider adjusts overall contrast and the saturation slider adjusts the vividness of colors.

You may adjust only one or two sliders, or all of them, but it is best to use them in the order they are listed. So, for example, set the black and white points before you set the brightness. Also note that some of the sliders are set by the automatic correction. You can adjust them, but if you follow with another automatic correction, your slider settings will be overridden.

Toolbar

You can tap the Reset button at any time to restore the original image and start over. Use the Undo button to undo the most recent correction.

To convert to a black and white (grayscale) image, tap the B/W button, or convert to a sepia tone with the Sepia button.

Turn the Preview switch off and on to easily compare the origian photo with the corrected one. The before image is displayed when the switch is off, and the after image is displayed when the switch is on.

To maintain your original image resolution, choose High. Higher resolution images take longer to save, longer to email, longer to upload, and use more space on your device, so don't save or share more than you need. Medium resolution is half the original resolution, and Low resolution is 640 x 640 or less, depending on the aspect ratio of your image. When sharing, note that the service or app that you share with may also scale your image to conform to its resolution requirements.

When AutoSave New Photo is on, the original, uncorrected version of photos that you shoot in iCorrect will be automatically saved as soon as you take them.