Version: 6.3.1

• Drag multiple racks plus new zooming options in server room layout view in v6.3.1
• Drag multiple racks or other objects in server room layout
• Zoom-in, zoom-out for the data center layouts
• API changes
• Cosmetic Changes
• Background task processor changes
• Improved server room layouts in v6.3.1

Details: http://blog.device42.com/2015/01/drag-multiple-racks-and-zooming-options-for-server-room-layout-view-in-v6-3-1/