tera4d2 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 -onsHeadquartered in Bend, OR, the Tetra4D of products are developed by Tech Soft 3D, a leading provider of software development tools for almost 20 years.