How to edit the contents on the page?                                                                                                                                                   

Step 1.  click Site Actions of the top right of the screen. Click Edit page.

Step 2. click Edit. Click Modify Shared Web Part.

Step 3. Click Rich Text Editor… on the right side.

Step 4. Click Ok on the HTML Editor Dialog. Click Ok on the content editor web part.

Step 5. Click Save and Overwrite Existing Content.

Step 6. Click publish button.