Drawings or chemical structures  pasted into Prism Mac from another program have a low resolution.

Prism Mac can only paste a bitmap, not a vector based drawing. So the drawing or structure will be at screen resolution, which will look grainy when printed.

One workaround is to make the structure large, and then copy and paste into Prism, where you can reduce its size. Another work around is to create the graph in Prism, and then copy and paste into another program, and use that program to include the drawing or chemical structure.