If you make a mistake while editing your photos in Lightroom, there’s a quick and easy way to undo the edit. Just follow these steps:

  1. In the Library module, select the photo you want to edit.
  2. Click on the Edit button (the three lines in the top left corner of the screen).
  3. On the Edit menu, click on Undo Edit.
  4. The photo will be reverted to its original state, with any changes you made highlighted in yellow. To keep any changes you’ve made, click on OK to close the Undo Edit dialog box. ..