JavaScript must be enabled in order to use this site. Please enable JavaScript in your browser and refresh the page. Editing Insight App Source Files Every new Xpress Insight project contains the files for a minimal Xpress Insight app. In this section you will edit some of these files to add functionality to the app. Covered Topics Using the View Designer and VDL to Create Custom Views The View Designer enables rapid development of custom views by allowing you to associate user interface components with model data for viewing and editing. View Designer Overview The View Designer is the default editor for a file with a .vdl extension when Xpress Workbench is initially installed—This setting can be changed in the project preferences. Parent Topic First Steps