Open your website in your favorite browser like FireFox. In this example we are looking at the looking at Mila Collaborative. 

Log in to the front end of the Joomla! site with your user name and password. Once your are log in, a small edit icon appears in front of the article title. Click the edit icon. (See Image I) 

A built-in editor (See Image II), much like Microsoft Word, opens within browser window where you can edit and save new content directly to your page. Remember to click save button at the top of the page.