How to Change the Saturation of an iPhone Photo

Open your iPhone's Photos. It's the multicolored pinwheel icon on the Home Screen.

Tap an album. You should have several albums listed here, including "All Photos" and "Videos". If you don't see any albums, tap Albums in the bottom right corner of the screen.

Select a photo to edit.

Tap the slider icon. It's on the bottom of the screen, to the left of the garbage can icon.

Tap the knob. It's to the right of the three overlapping circles at the bottom of the screen.

Tap the downward-facing arrow to the right of Color.

Tap Saturation.

Swipe the slider left or right. The slider at the bottom of the screen controls the saturation of your selected photo. Dragging it left will increase the photo's color intensity, while dragging it right will decrease the intensity.

Tap Done. It's in the bottom right corner of the screen. Doing so will save your changes.