mPrintPreview displays a quick-and-dirty preview of the print job. Typing any key advances to the next page; typing command-period (Escape on Windows) cancels the preview without displaying all the pages. When the page can't be displayed on the main screen at 100% (which is most of the time, unless you have a big monitor), the page is scaled to fit. Due to differences in font rendering at display vs. printer resolutions, you might notice longer lines of text "running over" in the preview, though they'll print normally.
