tera4dChapter 1: Tetra4D Reviewer™ overview Tetra4D Reviewer™ is a companion product of Tetra4D Converter™. Tetra4D Converter™ allows you to create 3D PDF documents from a wide range2 of 10. Step 1. After the installation of Tetra4D Converter, start Acrobat. Step 2. Click on Tools in the main Acrobat toolbar to access to the Acrobat features and to the installed Add -ons