When you add a picture to a page or post, there is an option called Link To with four choices: Media File (link the image to the original file), None (no link), Custom URL (go to another web page) or Attachment Page
- For Photo Galleries and pictures where you want the viewer to see a larger version – Always choose “Media File.” This activates the pop-up lightbox which allows viewers to navigate between larger versions of all images on the page without leaving the page.
- For logos, icons, and other small pictures which are already at full size – Choose “None” as clicking on the smaller size picture wouldn’t give the viewer any additional information.
The setting “Attachment Page” links to a separate page for each image. For best results do not choose this setting. The setting “Custom URL” is not usually used for photos.