Command in MS Word on Mac to resize whole text
You can do this in MS Word 11 using the Increase/Decrease Font Size buttons.

In MS Word select the Home tab. Under the section titled Font there are two buttons that both have an uppercase 'A' on them with an up and down arrow, respectively, next to the Font Size drop-down menu. If you select your entire document (using Command-A) and then select one of these buttons it will resize the entire documents proportionately.

The hot keys for these functions are Shift-Command-&lt; and Shift-Command-&gt;. And again, you need to have the desired text highlighted in order for this to work.