This is a personal view, but I don't consider IV as a CAD programme.
It's a solid modelling programme that enables you to create parts (.ipt), assemblies (.iam) then detail these in drawings (.idw) derived from your parts.
Once your views are in the drawing dimensioning is a piece of cake.

And the great advantage over a CAD programme is that if you change the part or assembly those changes are automatically reflected in the drawing!