How do I upload a file on someone else's model?

I saw some models that others uploaded the image or CAD file to someone else's models:
For example: Gary Hilson made a model aircraft: One file says at the top ''Uploaded by someone''
How do I upload a file to someone else's model?
1 Answer
That was an old feature here on GrabCAD, where users could render others' models and add them to their models.
leo zeng 22 Sep, 2021 07:07 PM what do you mean
leo zeng 22 Sep, 2021 07:07 PM Yahya T Khedr 22 Sep, 2021 07:34 PM It's a feature that got removed.
leo zeng 22 Sep, 2021 08:19 PM oh