< FCKeditor 2.x | Users Guide
Source Editor
FCKeditor offers you a possibility to view to the text you have written in the editing area in the HTML code. In order to view the HTML code press 
button on the toolbar.
Example:
After pressing button we can see the HTML code:
If you want to go back to the normal text just press again.
Editing the code in the HTML language is a very difficult feature and it should only be done by advanced users. If you don't have experience in HTML type the text normally.