Is there a white paper, book, something that defines the profile keys? Some of them are self descriptive, but others it's hard to see what they control. ie... [HKEY_CURRENT_USER\Software\Autodesk\AutoCAD\R16.0\ACAD-201:409\Profiles\A2K4\Dialogs\acad-105] It has something to do with dialogs, but...... Thanks, Tim