Archie,
I'm glad you discovered this feature. I have checked mine, read the manual and even went on the website for USPS. No luck, mine is ounces only.
I checked out Staples and their scales only offer 1 gram readout not in tenths. After looking at several it looks like I am going to buy a pocket scale called the Palmscale 6.0. It goes anywhere with you and measures in .1 g as well as ounces, carats, pennyweight and troy ounces.

BTW, a while back you suggested I use Microsoft Picture it for scanning. Now that I am used to it, I would be hard pressed to use anything else. TKS again