How to remove the EditLink area
By default your Caliban system comeswith a 4 x 4 pixel EditLink Hotbutton at the top left of the browser window. It should be completely invisible.
To remove this:
Click Modules
Click Components
Open your set001header.html (or whatever the equivalent is for the Set you are using) component.
Scroll down to the <body> tag.
The fist line after that reads " <*--HotButton--*>
Remove it.
Save your component.