As you work with a source, you may decide that you don't want some of the images in the source. Luckily, they're easy to remove.
Making sure you're in the desired source, select the photos you want to remove and press .
Select the photos you want to remove, and choose Delete from Album from the Photos menu () or, for albums only, Cut () from the Edit menu.
For albums only, drag the photos you want to remove to the Trash album.
For albums only, -click one or more selected photos, and then choose Cut or Delete from Album from the contextual menu (Figure 3.33).
To remove a photo from a smart album you must either redefine the smart album or change the photo's information such that the photo no longer matches the smart album's criteria.
Removing a photo from an album, book, card, calendar, or saved slideshow doesn't delete it from your Library.
iPhoto doesn't ask for confirmation when you remove photos from a source; if you make a mistake, either choose Undo Delete Photo from Album from the Edit menu () or add them again.
Dragging a photo to the Trash album from another album merely removes the photo from that album; it does not delete it from your Library, nor does it copy the photo to the Trash album.