Images that are inserted into the content of web pages and blog posts can be given spacing, border lines, and other settings which affect how they look in your content.
Your ProPhoto page layout will include a WordPress content module which you can edit to find the controls for each of the following image styling options:
Spacing between images
Image border lines
Image height constraint
Per-image Pinterest pin it buttons
You may use a WordPress plugin for Pin It buttons, or the built in Pinterest feature.