Crop and straighten photos.Rotate a photo or video: Click the Rotate button 
on your Mac, double-click a photo or video to open it, then click Edit in the toolbar.
To see the original image, click and hold the Without Adjustments button, or press and hold the M key.
Release the button or the M key to see the item with edits.
on your Mac, double-click an item you’ve made adjustments to, then click Edit in the toolbar.Choose Image > Copy Adjustments.
Double-click the item to which you want to apply the adjustments, then click Edit.
Choose Image > Paste Adjustments.
You can also Control-click an item in editing view and choose Copy Adjustments or Paste Adjustments.
You can quickly remove changes to a photo or video. To undo the last change you made, choose Edit > Undo, or press Command-Z. To discard all changes and start over, select the item and choose Image > Revert to Original.