Preferences
You can edit the set of search engines. You can edit current search engines, add new ones, or delete ones that you don't use.
Open the Preferences window: choose Preferences from the Huevos menu.
Editing a search engine
Double-click inside a name or URL. Then you can edit it as expected.
Important note: In URLs, %@ is replaced with your search string, the word or words you're searching for. So every URL in the Preferences window should have a %@ in it.
Adding a search engine
Click the New button at the bottom of the window. A new table row will be created. Then edit the name and URL of the new search engine. Be sure to give it a unique name (two search engines can't have the same name).
Deleting a search engine
Select a table row, then click the Delete button. A sheet will confirm that you really want to delete that search engine. Click Don't Delete if you've changed your mind; click Delete if you still want to delete it.