Jade should add details of the drawing to the BOTTOM LEFT OR THE BOTTOM RIGHT OF THE DRAWING.
The details must not be too close to the edge of the drawing, so that framing of the drawing will not interfere with it. This part of the drawing is a good point to place the drawing details because most art collectors usually check the bottom part of art works for the creator's name, beside the details are easily accessible from that end of the drawing without interfering with the whole work.