• URL Rewrite: The text displayed in the URL when you view a single gallery page. For example, set this to gallery for your URLs to look like site.com/gallery/gallery-name.

After changing this field go to Settings → Permalinks → Save Changes.

• URL Rewrite Name: The name displayed in the breadcrumbs when you view the single gallery page.
• Category URL Rewrite: The name displayed in the URL when you access the galleries archive, such as a galleries category. For example, set this to galleries-category for your URLs to look like site.com/galleries-category/category-name.

After changing this field go to Settings → Permalinks → Save Changes.

Category URL Rewrite and URL Rewrite can’t share the same name.