One reason why your PDFs might be Huge
The difference between the 2 PDFs in this image? One fill Left without vectorial fill = 12 KB. Right with vectorial fill = 1.6 MB. This is one of those semi-secrets of ArchiCAD. 3D is better than 2D. We all know that. But more often than not, all the 3D elements take up less hard drive space than all the 2D ones. Stuff a project with tons of 2D