2. The method of claim 1 , further comprising: determining that user interaction with one of the identified canonical images; and in response to the determination, increasing a presentation size of images that are included in a same hierarchical grouping as the one of the canonical images.
4. The method of claim 2 , wherein increasing in presentation size of images that are included in a same hierarchical grouping as the one of the canonical images comprises increasing a presentation size of child or grandchild images of the one of the canonical images more than an amount by which a presentation size of the one of the canonical images is increased.