Generate Side View will display a side view for an Elevation Shape. The shape is scaled based on the Height and Depth fields for the Product.
Select the shape(s) for which you want a side view, right-click, and select D-Tools > Shape > Generate Side View.
A side view shape will be displayed next to the original shape.
When generating a side view for more than one shape at a time, e.g. a rack full of equipment, you may have to use the Bring to Front/Send to Back functions in Visio. Below is an example from a sample project of a side view of a rack.