The Open/Save preferences panel is opened from menu Editor+Open/Save
→ → +Specifies the default behavior when the longest line of a document exceeds the specified limit. You can choose between:
Always format
Never format
Always ask
If selected the <oXygen/> plugin will perform a well-formed check every time the user saves a document.
Save all opened files before validating or transforming an XML document. In this way the dependencies are resolved, for example when modifying both the XML document and its XML Schema.
If checked, the undo action has no effect after you've saved your document. You can only undo the modifications made after you've saved it.