just select something and then hit the Search-button!
And always a good idea to right-click on buttons, just in case, some have a handy menu there (or add one yourself)
It's also possible to type some search terms in the urlbar and then hit the button to search.
It's also possible to add search engines as bookmarks, give them a nickname, then type the nick and search terms in the urlbar and now hit RETURN (not Search)
(example: nick "gt" for bookmark www.google.com/search?num=30&gbv=1&strip=1&q=%s )
KM works a bit different in some ways as other modern browsers, and documentation is often obsolete and misleading, so always a good idea to ask here
(sig) K-Meleon FAQ
(link missing in forum sidebar)
New to K-Meleon? What do you like? What not?