Access the Page Editor
The page editor is where you update content, add components, rearrange sections, and make other changes to a page. There are two ways to access it:
From the Page
While logged in to Drupal, visit a page you have permission to edit. Select Edit [Page Name] in the upper-left corner beneath the Drupal icon.

From Workbench
Find the content in Workbench and select Edit under the Actions column.

See Log In to Drupal for help accessing Drupal.