Want to increase font-size of entire document

[Guest ker_per]

I want to increase the font-size of the entire document when it prints. I changed the font-size from 6.7 to 20 as shown below, but there's no change in the size of the fonts printed.BODY {font-family: "Tahoma"; font-size: 20pt; font-weight: 400; line-height: 1.7em; white-space: nowrap}