Acrobat Professionalで添削しても，相手がMacで見ていると，加筆が表示されない問題に逢い，ひどい目にあった．と言っても，これは2回目の経験．ああ，すっかり忘れていた．．．orz
I was beaten by a crucial problem that rewritings done on Window's Acrobat Professional are partially not shown on Mac. I didn't remember this problem despite this was my second experience... orz
