Labeling blank HP 41 overlays

[striegel]

(02-15-2022 04:48 PM)Dave Britten Wrote:  ... original white overlays ... I'm trying to figure out the best way to label these. A 0.5 mm mechanical pencil directly on the overlay gives fair results, and is easy to erase if I want to change the assignments, though the lead can be smeared away fairly easily.

... I'm hesitant to write directly on the overlay with a Sharpie, since I may want to change the assignments later.

You could try using the Pilot Frixion Ball slim Retractable Erasable Gel Ink Pens,fine Point, 0.38 Mm. I carry one with me everywhere in a pocket.