• Number of Projects per page: Set how many projects per page you want to display.

• Number of columns: Set the number of columns.
• URL Rewrite: The name displayed in the breadcrumbs when you view the single project page.
• Category URL Rewrite: The name displayed in the URL when you access the projects archive, such as an projects category. For example, set this to projects-category for your URLs to look like site.com/projects-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.