In VirtualShow 3D, open the settings and select Edit Models:
Via Manage Models you can add new objects as (GLB file):
This function works identically to "Manage Symbols". Upload and name your object, and it is immediately available in the Add Model section.
To add an object to your stand, select Add Model:
And select the object from the drop-down list:
After you add the object, it will appear on the screen and you can edit it using the E, W and R keys:
E to rotate the selected object along the axes shown:
W to move the selected object along the axes shown:
R to rescale the selected object:
In the submenu you can delete the object if necessary.