tera4dtetra4D is pleased to announce the release of 3D PDF Converter 4.1! This release is the result of almost a year of continuous development and includes several hundrered2 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