If the Apply Transformation Scenario button from the Transformation toolbar is pressed and there is no scenario associated with the edited document but this contains an xml-stylesheet processing instruction referring to a XSLT stylesheet (commonly used to display the document in Internet browsers), then Oxygen XML Author will prompt the user and offer the option to associate the document with a default scenario based on this processing instruction. The default scenario contains in the XSL URL field the URL from the href attribute of the processing instruction. This scenario will have the Use xml-stylesheet declaration checkbox set by default, will use Saxon as transformation engine, will perform no FO processing and will store the result in a file with the same URL as the edited document except the extension which will be changed to html. The name and path will be preserved because the output file name is specified with the help of two editor variables: ${cfd} and ${cfn}.
Oxygen XML Author comes with preconfigured built-in scenarios for usual transformations that enable the user to quickly obtain the desired output. All you need to do is to associate one of the built-in scenarios with the current edited document and then apply the scenario with just one click.