Here is an tutorial on how to input 2D Ducting Input over a PDF drawing.
By using a PDF underlay (faded or screened) of our floor plan, you can draw your duct runs over the top. This is a 2 part series (part 2 coming soon) - subscribe to be notified - lots more to come.
We are using AViCAD - available at cadavenue.com - its a AutoCAD alternative at a much lower cost.
See also 50+ CAD commands you need to know mentioned in video: • Crash Course CAD Tutorial - Common CA...