doc-view-set-slice-from-bounding-box
doc-view-set-slice-from-bounding-box is an interactive compiled Lisp function in `doc-view.el
'.(doc-view-set-slice-from-bounding-box &optional FORCE-PAPER-SIZE)
Set the slice from the document's BoundingBox information.
The result is that the margins are almost completely cropped,
much more accurate than could be done manually using
`doc-view-set-slice-using-mouse'.