doc-view-set-slice-using-mouse
doc-view-set-slice-using-mouse is an interactive compiled Lisp function in `doc-view.el
'.
(doc-view-set-slice-using-mouse)
Set the slice of the images that should be displayed.
You set the slice by pressing mouse-1 at its top-left corner and
dragging it to its bottom-right corner. See also
`doc-view-set-slice' and `doc-view-reset-slice'.