Adding image/texture to one side of a box

if I want to add an image as texture to one side of a box (only one side). Do I need to prepare a graphic file with all faces, or can I do it by Nomad?

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YES, trying to recreate my side

I managed some of it, but my conclusion is, as I work simultaneously on PC and Android, that I will prepare the image on PC and the object on Android, and then ass as texture.
I need later the image on different shapes than boxes
Thanks any how

eventually using MS 3D builder was the easiest way, I can use it to project an image on one side only and then save as OBJ or GLB, both can be imported to Nomad