To set small fonts, go to your desktop, right click your mouse on a blank area, and select properties from the pop up menu. Under the Settings tab, there is a Font size field. From the dropdown list, select small font. You will have to reboot to have the change take effect.
You will notice many of the images look smaller, and you may not like that after you have finished using Find and Replace. Use the same procedure to revert back to Large Fonts. Many users normally use small fonts, and don't notice the problem. Font size depends on your screen size, and what you feel comfortable with.