Finding a particular picture is usually the goal, and because the page numbers for a given item change as new pictures are added, clicking to view the shot full sized, then getting the address (or getting the comments which also brings up the preview address), then saving the address, will allow the picture to be 'recovered' later with ease.

[If you want to open an individual post to bookmark it, all you have to do is click on the title (the "headline" above the photo), or click on the photo itself. The goal for most people with navigation questions is looking at all of the photos on the site -- which means knowing how to resume browsing where your last session ended. If you want to find one particular photo, your best option might be the Search box. - Dave]