I read a LOT of windows excel files that have been made to be printed on one page. When I open them on my Office X for Mac, the page setup is broken, and it is the same for all office files...
This is true for the same printer (Epson inkjet or Laser printer), and that the software on both sides (mac/PC) is up-to-date.
2 questions :
1- Why ?

2- How can I fix this ?
Thanks !