Provide Agisoft with GCP position in image

[Helsky]

Dear Agisoft team,

I use uncoded markers that are unfortunately not recognized by Photoscan automatically. However, with some image processing I can find the markers in my orthophoto.

Is it possible in some way to provide Agisoft the positions in the orthophoto along with the GPS coordinates such that clicking the "optimise camera alignment" button will use this information to georeference the scene and tag the GCPs in the images?

Thanks a lot,
Helge