Another fix, which doesn't lose the record of tracked changes, is to open
Tools Options Track Changes and set the Use Balloons dropdown to
"Never".

What you saw was not a change of "paper size" -- it was making room in the
right margin to show the balloons. It is, as they say, "working as
designed".

--
Regards,
Jay Freedman
Microsoft Word MVP FAQ: http://word.mvps.org
Email cannot be acknowledged; please post all follow-ups to the newsgroup so
all may benefit.

DonD wrote:
Fix:
Tools, track changes, (it opens tool bar) accept all. Paper size
snaps back to normal. Another hidden Word landmine.

"DonD" wrote:

The ruler is shorter than the paper. I have a huge r-margin in the
print view (blank). The ruler is normal scale, but the paper is way
large. Looks like the paper and the ruler are out of sync. The track
changes had been used by the previous author. Funny how much "stuff"
this guy created. I have to revise his "stuff" daily, there's always
something new. You don't know how tricky Word is until you revise an
amateurs work (actually uses spaces instead of setting tabs). I'm
sure this is another Microsoft glitch. Funny how I used Word Perfect
in the late '90 and never had any problems and could even make the
boarders on the top row of a table larger than rest of the table. It
tool Word years to allow you to split cells. Even today Word tables
are totally unreliable. You do a little cutting and pasting and
before you know it the formatting of you table is garbage, and
there's no fix.