NOTE: This is an explanation on how to copy between folders. To see how to move images click here
First, Go to your Photos section.
Next, select the folder you wish to move your photos to, Then click on the Add Photos button.
Select My TreeRing Photos or Shared Photos on TreeRing
From the drop down, choose the folder that the photos are located in
Now, select the photo's you wish to add to this new folder, then click select.
Presto! Your images are have now been copied to the new folder!
One last step, this process will copy the images from one folder to another. This means they still exisit in the original folder. If you wish to delete them from the original folder, please see - How do I delete a photo from a folder?