From the toolbar, shown below, click on “Content”, which should be the first item after the home icon.
You will then notice a listing of all your nodes that exist on your site. At this time, take note that Content is the highlighted tab in the local actions menu.
Also in the local actions menu is the Snippets tab. Clicking on this tab will take you to the Content Snippets admin tool where all of the Content Snippets that exist on your site will be displayed.
Regardless of which type of content you wish to edit, once you have found the specific item you wish to modify, simply click on the edit button found at the right end of the item’s row.