Basically, an STP file is used to store 3D models and to transfer 3D data between CAM and CAD software. STP file is stored in text-based ASCII format in STEP Application Protocols ISO 10303-2xx rules.

Rotate a 3D model that appears in a PDF, CAD or modeling-program file. Click on the model with the Hand tool to activate it so you can access Acrobat's 3D tools.

You can import and add a PDF to OneNote as a file attahcment or printout image, or convert and add PDF to OneNote. Here's how!