If you print
your PowerPoint slides with either the Grayscale or Pure Black
& White options selected in the Print dialog box, you may find
that objects you expected to be invisible print with a black
outline. For example, if you've used a rectangle the same color as
the background to block out another object on the slide, the
rectangle will show up as an unfilled but outlined rectangle on
If you run into this, first try printing the problem page again,
but deselect the options Grayscale and/or Pure Black & White.
If that doesn't help, try customizing the way the object prints in
Black and White View. Click Black And White on the View menu;
PowerPoint displays your presentation as it will print it to a
black and white printer. Right-click the object that you're having
trouble with, choose Black And White from the context menu, then
Verify that the object is displayed on screen the way you want to
print. If not, try one of the other Black And White options.
Note: This affects ONLY the way PowerPoint prints your presentation
to black and white printers. It won't affect what you get when you
display the presentation as a screen show or print to a color
printer (see picture 1).