The file association for HTML files in Window > Preferences is not configured properly. Why is nothing displayed in the Help pane or in the Preview view?.Why is my XML file not opening in the default editor?Įclipse has been configured to open unlocked XML files in a read-only XML editor.You can install or update the XML editor from an update site or by using a dropin. How do I install or update oXygen XML Editor or oXygen XML Author in the DITA CMS?.You can perform some troubleshooting to allow topics to open in oXygen Author mode. Why can't I view my topic in oXygen Author mode?.You can create a new default preferences file for the XML editor to import by default. How can I configure default preferences for oXygen XML editor?.