Like this, but replace { } brackets with square ones [ ]
Type {url=
xxx} where the
xxx is the url (the full address) of the link
Then type the text that you want to appear as the link e.g.
click here for pics of my veg. Underline it using {u}...{/u} tags around the text.
Finally, close it off with {/url}
So to make
this link to Google you would put {url=http://www.google.co.uk}{u}this link to Google{/u}{/url}