You can insert a CAD drawing on a paper in Paper View either by dragging and dropping a CAD file onto the paper, or through the CAD Settings:

To insert a CAD drawing on a paper, follow these steps:

1. In Paper View, go to the Tools (paper) component tab and click the CAD Settings button. The CAD Settings dialog opens.
2. At the bottom left, click the Import new button. The Windows Open dialog is displayed. Select your CAD file and click Open.
3. The imported CAD file is now listed in the Not inserted section to the left.
4. Adjust the CAD properties and CAD layers to the right, and click the Insert button when you are done.
5. If the drawing is too big to fit the paper, you are asked if you want to fit the drawing to the paper. Reply Yes or No:
   
6. The CAD drawing is now inserted on the paper:
   
   which is also indicated in the CAD Settings dialog:
   

For more information about CAD Settings, see this article.