Abstract: In order to work with user interface documents containing instances of reusable templates which describe both the appearance and behavior for a user interface element, editing functionality is provided. The user interface document can be edited by selecting items from a view of the user interface document and indicating an edit to be performed. Edits may be to an underlying template or templates, or to properties of selected items. The scope of the edit is determined by user indication and/or defaults of user preference. Locks are provided in order to prevent accidental editing of some locked element or template. A graphical tree view, a list view (text-based tree view), or an artboard view may be presented to a user in order to facilitate the selection and editing process.