Sample crop instructions, with full details.
Book: Magic For Beginners, by Kelly Link, released under CC license; more filetypes available at
http://www.lcrw.net/kellylink/mfb/index.htm
Open book.
Flip to find first full page of content... page 18 of the PDF. (Which says it's page 25, which means the PDF has removed the blank pages that exist in the print edition.)
Control-shift-T to
open crop dialogue. It's already cropped .375" all around; this is common in PDFs created for print & later released as free ebooks. Change crop settings to be as close as possible to top & bottom of main text, and remove side margins:
Top 1.25"
Bottom 1.5"
Left .85"
Right .85"
(Resulting page size is 4.967" x 6.917")
Check "Page Range" area--I want everything from the first page, so where it says "From 18 to 18 of 223, I change it to "
From 2 to 223 of 223." Make sure "Even and Odd Pages" is selected.
Click Okay.
Save-as (Ctrl-shift-S) to write over original file.
Quick scroll through to see problems... whups, last few pages are formatted differently; final page is book wrapper. Want to fix those. (I could just ignore those; it's not like I'm going to read the press release announcements. But I like my PDFs to be readable.)
Go to page 220, open crop format. Put 220-223 back to the .375" all around crop (removing that puts in the printer margins).
Save as again. (I'd add tags before transferring to Reader, but that part's optional.)