When I type something in Word on my mac, save it to my flash drive as '2000-2004' for Windows, and then open it with Word 2003 (margins being the same), it appears that the text takes up much more room on the screen. In some cases a single page on my mac will take up 1.5 pages in Windows. Margins and text size are set to the exact same! It is annoying to have to reformat every time I go back and forth.