[JKT]

The easiest way to add them is to use the status bar icon:



Click the search field you want to add a shortcut for, click the magnifying glass+ that appears in the status bar and add the field. E.g. for this forum:



Note, the sps currently have a bug that prevents some search fields being added in this way (e.g. macupdate.com).

Edit: I've just noticed that there is a bad bit of UI in that dialogue sheet - OmniGroup refer to Keyword as short name in the text and not as keyword.