Centering Text from Windows to IOS

Text is, it appears by default FLUSHED LEFT, and when I open in full screen, there’s all that negative space to the right in Windows where I write. I would like my work more centered (not using of course the center align tab) in the middle of my screen. I’ve set tabs, centering my text in Windows as I like it: LT 3 - RT 12 (it keeps my text and pictures dead center) but when I open my ‘synced’ iPad, the text is very squeezed together (thin and long columned) and not centered and more to the right of the page. How can I make it centered as is in Windows.

How about just keeping my text central in the middle of my screen just in Windows? Tab settings? Perhaps it will adjust in IOS as well? Suggestions?