To edit your pages, click Pages in your dashboard menu on the left-hand side of your page.
To edit, click the name of the page or hover over the page you want to edit, and click Edit.
When you have completed your edits, you can Preview Changes first, then click Update when you are ready to publish your changes.
Alternately, once you’re logged in, it is very easy to use the WordPress toolbar to navigate to your desired page, click Edit Page on the toolbar and toggle to your page editing interface. Clicking View Page on the toolbar from the back end will toggle you back to view the page.