I know many places it goes through, but the answer to what I am seeking, I couldn't find.
Outside the speed and low memory these two things: thumbnails in the Windows Explorer and option to change the left and right pages of the document (see the first page alone). It's good for document layout over two pages.
Sumatra or Foxit Reader are nice, but anyway I'll be back eventually to Adobe Reader because of this ... ;-(
thanks for the tip