I would like to know if it is possible, in a search results list, to add a button/link that will expand a record using a different form than the preset at the query screen. The utility would be to have two (or more) alternative detailed views of each record.

Thanks in advance to anybody that may help.

Instead of using the expand record functionality, you could use a canned query to launch the single record using the desired form.

Support Knowledgebase article 2104 provides the syntax for canned queries.

You would construct the URL by using beginning and ending text around the ID field contents (or any unique field in the record that doesn't contain spaces).

Yes. I have a button called More, which uses this script (More is named displayRecord):

function displayRecord_onClick()
{Command.selectFormsEx("altForm","","","");
Command.displayRecord();
}

Is this what you mean? (Or do you mean with Webpublisher.)