Its quite simple.....
First find a link that you want to use
Copy the whole link to your clipboard
ie.
http://www.turkishliving.com
Now...
See the "globe with the chain link" icon above
Click on it
Now... Enter the text that you want to put in your post with a link in it
ie. Turkish Living Homepage
Press OK
And then you will see another box appear and it will already have http:// highlighted - we dont want this, so use the backspace key and delete it.
Then, from your clipboard paste the url into the box and hit ok.
The link and the text to the link will then be automatically copied into the post - (see below)
Thats all there is too it.