How to Set Single Spacing in Microsoft Word 2007
By default, the line spacing in Word 2007 documents is set to 1.5 spacing. Changing a document to single spacing is quite simple. You can single-space an entire document or just a section of text in a Word document.
Open the Word document in which you want to set single spacing. If you want to apply single spacing to only a section of the document, highlight that text. If you don't highlight any text, the text you type in your document will automatically be single spaced.
Click "Home" from the toolbar, and then "Paragraph."
Click the "Line Spacing" button located next to the "Justify" button to view line spacing options.
Select "1.0" from the list of spacing options to set the document to single spacing.