Foxit PDF Editor supports a variety of 3D file formats including U3D (Universal 3D), PRC (Product Representation Compact), and glTF (GL Transmission Format). You can view, navigate, measure, and comment on 3D content in PDF documents. The Model Tree, the 3D toolbar, and the right-click menu of 3D content can help you work on 3D content easily. You can show/hide parts of a 3D model, set different visual effects, rotate/spin/pan/zoom a 3D model, create and manage 3D views with different settings, add comments/measurements to a part of a 3D model, add a 3D model to a PDF page, and more.
Note: By default, Safe Reading Mode is enabled. When you open a PDF with 3D content for the first time, a dialog box pops up to ask whether you trust the document to enable/activate the 3D content in it, and you can select an option to trust the document one time only or always trust the document. Selecting Trust this document always in the dialog box also adds the document to the privileged locations, and the dialog box will not prompt next time you open the PDF. See also Privileged Locations. Note that the dialog box does not necessarily pop up when you open a 3D PDF. Sometimes it pops up only when you click on the 3D content in the PDF. When it pops up is determined by the activation settings of the 3D content. And the message displayed in the pop-up dialog box varies depending on your trust settings for Foxit PDF Editor. See also the 3D setting, Security settings and Trust settings.