I hope I have done this right - may be too small to see? Also, Printer Profiles rendering Intent is set on perceptual - I have selected the others and saw no improvement in the soft proofing, but have not tried to print.
Fred - I checked out those quality options you were talking about, but with the canvas settings it will only allow me to adjust down. When I use the fine art papers it will allow me to increase to 5. However, Canvas will let me select Finest Detail. I have not tried either of these yet, but will on my next attempt.
Please put the check into Finest detail. When you close the properties box the input ppi should change to 720 x 720.. If it did not, go back and recheck Finest Detail.
The driver for the 9800 allows highest output with your paper, but you said you have the 9880, so it might be different.
Nevertheless, when I use the highest DPI output on my printer, I need a magnifying glass to see the difference and I had better be looking at a tree trunk with a lot of detail.
So that is a minor concern.
I have one last comment, and then I leave you in Brian's capable hands.
Please, do not rely on softproofing to to try to get any idea of what the real print will look like.
Especially, in your case. You are looking for detail after printing on a very difficult paper to achieve detail.
You must test by printing.
Good Luck,
fred