The changing thickness of manuals

[Maximilian Hohmann]

Hello!

(12-01-2022 10:41 AM)Garth Wilson Wrote:  I need to be able to make my notes, cross-references, underlining, add my stickies, etc..

As (mainly) a collector of calculators I would never do that ;-) Rather leave the manuals in their original unopened cellophane shrink wrap, like for example with my HP-15C Limited Edition. That unopened manual alone is probably worth more than all the calculators together which our thread starter is writing about.
BTW: Most pdf readers offer funtions like making notes and annotations.

Regards
Max