Add More Photos to a Collection?

When you’re working in the Library module and you see an image, either one you just imported or one in a different collection, and you want to add that image to an existing collection, just click on the image and drag it directly onto the collection you want it to go in (as seen above, where I’m dragging an image into the Picks collection, inside the Leaving The Church collection set. You’ll see the collection highlight and a little green circle with a + (plus sign) on it appear when you’re right over the collection. Just release the mouse button to drop that photo into that collection.