There are many solutions available for displaying your photo gallery, and not all of them are created equal.
If you want to have thumbnails display on the same page as the full-sized versions, this will increase ease of navigation, but the space that the thumbnails take up on the page will compete with the remaining space available for the full-sized versions – perhaps forcing them to be smaller on the screen than you would like.
Having the full-sized versions appear on a different screen by themselves will allow you to make them larger, but will force the user to refer back to the thumbnails when navigating.
Lightbox solutions have become popular, in which the user can click on a thumbnail, and a new page with the full-sized version pops up on the screen: These can be impressive for the first-time viewer, although repeat visitors can become annoyed with the amount of time it takes for each image to pop up (this time adds up quickly if users are interested in viewing multiple images).
Consult this list of photo gallery design possibilities before making any final decisions on how your photo gallery should display on the screen.
Before investing a large amount of time and money in a photo gallery, consider Flicker.com as well.


