Zoom Out or Zoom In 

This is another type of option to change the view of our document. We can Zoom-out the document to reduce the display size of the document and we can Zoom-in the document to increase the size of the document.
To Zoom-out or Zoom-in our document, do the followings :
Select View->Zoom
Zoom dialogue box appears

In the Zoom to area select one of the options and click Ok.

This will change the display of the document
Changing the page setup
(Changing Margins, Page Size and Page Orientation)

In MS-Word, we can change the margins, page size and page orientation. In order to do these adjustments

Select File->Page Setup
Page Setup dialogue box appears

Margin

Click on the Margin tab (if Margin tab is not displayed)

 Type the Left, Right, Top, Bottom, Gutter, Header, Footer and Gutter Position as necessary and then click Ok

Paper Size

Click on the Paper Size tab (if Paper Size tab is not displayed)

 Do the customization and click OK.