Re:
Hmmm... I don't know how to "create a PDF from a scanner". <:-)
I typically scan documents to TIFF files. Then, open Acrobat
(not Acrobat Reader) and paste the document in along with any
added text, etc.
So, it was my understanding that Acrobat did NOT further process
the TIFF -- nor a JPEG, etc. Rather, just "held it in place
on the page"
*********
That's the hard way of doing it.
The somewhat easier and generally preferred way:
- Open Acrobat
- File / Create PDF / From Scanner
[This is from Acrobat version 6; may be different in other versions].