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