Quote:
Originally Posted by frabjous
The programs I mentioned and linked to will automatically calculate the whitespace and remove all the whitespace possible. If all you're cutting out is whitespace, and you don't want to leave any behind, there shouldn't be an issue.
If you want to leave any whitespace there, or you want to crop out non-empty parts of the page, things get more complicated. I give some input on doing that with calibre's pdfmanipulate program in one of the threads I linked to, but without a GUI you just have to use trial and error, or measure what you need to crop.
SoPDF is a commandline program, but there are two simple GUI wrappers for it for windows. One I wrote, which you'll find you go far enough in the thread. Another Nathan Campos wrote, which you'll find if you search the forums here at Mobileread. His is nice because it shows any errors you get in the window, but mine has some other nice features (though I'm biased). (I don't personally use either, since I don't use Windows anymore.)
If I recall correctly it's the -m3 or "Fit Height" option that will only crop, not split the pages.
There are different levels of "leaving the rest behind" vs. cropping. Adobe Acrobat's cropping feature for example, just inserts a command for hiding portions of the page which is not respected by non-Adobe PDF viewers. The methods I've listed do better than that; they do genuinely resize the page. However, they don't fully remove elements that get cropped out if you're removing more than just whitespace; they just aren't shown. If all you're cropping is whitespace, however, there's no difference.
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Thank you frabjous
I will looking for GUI wrappers