Tried that! It won't stick when you close the document and open
another one, also the first time you hit Enter it jumps 2 spaces then
single spaces after that.
You must change the formatting to Normal Style, save the document and then
close Word (and Outlook if it is open) and you should get a prompt to save
changes to normal.dot which you should answer YES. Then the change will work
on all instances of normal style.
On a new document - click on the second "No Spacing". While the No
Spacing is highlighted - right click on "Normal" then click "Update
Normal to Match Selection.