1. Launch Microsoft Word 2010 and open the document containing text you want to justify. Click the "Page Layout" tab at the top of the window and then click the small button in the bottom-right corner of the Page Setup section of the menu bar.
2. Click the "Margins" tab at the top of the window. Adjust the values in the Left and Right fields to change the amount of white space that appears on the sides of the document after justifying the text. By default, Word 2010 places one-inch margins on both sides of the page. To reduce the margin size by half on both sides, type ".5" in both fields. Click "OK" to save your settings.
3. Click and drag the mouse pointer to highlight the text you want to justify.
4. Click the "Home" tab at the top of the window and then click the "Justify" button in the Paragraph section of the menu bar; alternatively, press "Ctrl" and "J" simultaneously. Word may not automatically justify the final line of a paragraph because doing so creates large spaces between the words. To justify the final line, continue.
5. Click to place the cursor at the end of the final line of highlighted text and then press "Shift" and "Enter" simultaneously to justify the line.
Justify Vertically
1. Launch Microsoft Word 2010 and open the document containing text you want to justify. Click and drag the mouse pointer to highlight the text.
2. Click the "Page Layout" tab, click the button in the lower-right corner of the "Page Setup" section of the menu bar and select the "Margins" tab in the new window.
3. Adjust the values in the Top and Bottom fields to change the amount of white space that appears on the top and bottom of the document after justifying the text.
4. Click the "Layout" tab and then select "Justified" in the drop-down menu next to Vertical Alignment.
5. Choose "Selected Sections" in the "Apply to" drop-down menu at the bottom of the window and click "OK."
