Thanks. This pen indicator wording showed up in late March, and I did not change any of my settings. Suddenly, I would see a thin line and a mark on the tank and about the the line, the words "Thin" or "Thick" would appear. I thought it was a new part of the mod pack. Honestly, I don't know why it happened nor why it suddenly disappeared. Pity, no one seems to know, as this pen indicator was so helpful. Thanks again, Mike