Simply, navigate to the page you want to edit. Depending on the moderation Status you’ll see a different Edit tab:
If the page has no unpublished Drafts click the New draft tab:
The notice at the top of the page will let you know that you’re viewing the most recent draft of a published page. 
If there is a Draft that has not been published click the Edit draft tab:
The notice at the top of the page will let you know that you’re viewing a published page but not the most recent Draft.
Beware of Changing the URL Path Address
When a page is created the site will create a human readable URL alias for you. If you change the Title field of the page, it will change the URL path address. If the page is linked to elsewhere or already indexed by Google or other search engines, you will create broken links! Learn how to keep the same URL path address.
When You Can’t Find the Content
Navigating to some content can be difficult if it is part of a view (aggregated list like, the News page) and it links off site.
Use the Search Box on the Dashboard to search the Title.
Or
Click the “All Content” link in the “Find & Review Content” area of the Dashboard and use the filters to narrow in on the type of content your looking for.
