After you’ve taken a lot of snapshots, you might want to delete some of them.
Click the Delete (x) button in the thumbnail.
Click the thumbnail of a snapshot you want to delete, and then choose Edit > Delete.
To delete all your snapshots in Photo Booth, choose Edit > Delete All Photos.
If you choose this item, you cannot recover your snapshots.
Before you delete a snapshot, you can export it. To export a still snapshot, select its thumbnail, then click iPhoto. To export a 4-up snapshot or a movie clip, select it and choose File > Export.