I suspect this goes WAAAYY back to PPT's origins as a Mac program.
The early Laserwriter printers had so little memory available that they
played
a kind of tradeoff game ... they'd give up memory from the "page buffer"
(the
RAM that held the dots prior to printing them) in exchange for more memory
to
hold and process graphics/fonts/text.
When they gave away page buffer it meant that they couldn't print as large
an
area and if memory serves, the smaller area was on the order of 10 x 7.5"
You can see my gray hair and wrinkles and hear my shaky voice from where
yer
sittin' can'tcha sonny? ;-)