AARP
You can use Effects tools including Exposure, Brilliance, Highlights and Shadows; the outline around the button indicates the level of adjustment you have made for each effect.
Modify light and color. In Photos, tap a photo to view it in full screen. Tap Edit, then swipe left under the photo to view the effects tools you can use to edit, such as Exposure, Brilliance, Highlights and Shadows. Tap the effect you want to edit, then drag the slider to make precise adjustments.
The outline around the button indicates the level of adjustment you make for each effect, so you can see which have been increased or decreased. Tap the button to toggle between the edited effect and the original. Tap Done to save your work.
Pro tip: Tap the Auto button to automatically apply effects to your photo. You can change individual settings afterward.
Crop, rotate and flip. In Photos, tap a photo to view it in full screen. Tap Edit, then tap the cropping tool at the bottom right of the screen. Drag the rectangle corners to enclose the area you want to keep in the photo, or you can pinch the photo open or closed.
To crop to a standard ratio, tap the Aspect Ratio Freeform button — at the top, second from right — then choose an option such as square, 16:9 or 5:4.
To rotate the image 90 degrees, tap the Rotate button — at the top, second from left. To flip the image, tap the Flip button — at the top, on the left. Tap Done to save.
Straighten and adjust perspective. In Photos, tap a photo to view it in full screen. Tap Edit, then tap the cropping tool at the bottom right of the screen. Swipe left under the photo to view the effects you can edit: Straighten, Vertical or Horizontal.
Tap the effect you want to edit, then drag the slider to make precise adjustments.
The level of adjustment you make for each effect is displayed by the outline around the button, so you can see at a glance which effects have been increased or decreased. Tap each button to toggle between the edited effect and the original. Tap Done to save.
Apply filter effects. In Photos, tap a photo to view it in full screen. Tap Edit and the filter icon to the left of the cropping tool to apply filter effects. Tap a filter, then drag the slider to adjust the effect.
To compare the edited photo to the original, tap the photo. Tap Done to save.
Source: https://www.aarp.org/home-family/personal-technology/info-2022/smartphone-photo-effects.html