Edit Thumbnail Cropping in Media Library

To change how WordPress crops an image to create the thumbnail:

  1. Select the image in Media Library
  2. Click the “Edit Image” button under the large image
  3. If you only want the change to apply to the thumbnail select “Apply changes to thumbnail” in “Thumbnail Settings”
  4. Click and drag the cursor over the image to highlight the area you want to use for the thumbnail. If the thumbnail is square you can adjust the dimensions in the “Image Crop” area to give equal width and height. You can also drag the selection around to get the position just perfect
  5. Click the “Crop” option above the image
  6. Click the “Save” button below the image to save your changes
  7. Now if you go back into the “Edit Image” option you should see the new thumbnail