We do not have any direct (point and click) way of doing this. The only way is through HTML editing.
See:
http://www.w3schools.com/html/tryit.asp?filename=tryhtml_link_locations
and
http://help.wildapricot.com/display/DOC/Editing+web+pages
Denys Zlobin
Helpful Apricot
http://www.wildapricot.com