A family of Microsoft word processing software products for creating web, email, and print documents.
I believe that the dotted boxes you are describing are the so-called text boundaries. You can turn those off by clearing the option "Show text boundaries" at File > Options > Advanced.
If you are also seeing nonprinting marks (such as a ¶ at the end of each paragraph), you can hide them by clearing all the boxes under "Always show these formatting marks on the screen" at File > Options > Display.