Maybe I'm looking in the wrong place in admin to find the content_id. I've checked the Content Manager and the Categories.
When in Content Manager, I clicked on the content (Getting Started) which I want to determine it's URL. The address bar displays //your_domain.com/a/index.php?rt=design/content&s=admin123&token=5ccd7c88d98ad2b1a44c8fae2d27cfef#rowNum=10000
It doesn't contain the term content_id.
Again, I'm trying to determine URL so I can build menu based on Category menu which link to external and internal pages. Plus, I need to link from an HTML Block to a Content page.