Lightbox View for Blogger Images
Clicking on an image in a blog post will brings up the image in a larger overlay on top of your blog, called a lightbox. All blog images regardless of whether directly uploaded from your computer or linked to from another source will display in this lightbox view.
If there are multiple images in the blog post, then all of those images will be available to browse through when the lightbox view is opened.
If you’d like to disable Lightbox on your blog, sign in to Blogger and select No next to Lightbox in the Settings | Posts and Comments section.
Note that lightbox is disabled for blogs with Dynamic Views enabled.