I was told that Flex allows for keyboard sizing (CTRL-, CTRL+) as well as menu (VIEW | Zoom). To do that, a proportional sizing must be used in the CSS. "em" doesn't seem to work (be accepted) by Flex Builder. I get this error:
Multiple markers at this line: -CSS Value for 'font-size' not supported. -CSS Value for 'font-size' not supported.
based on this code (the error is on the "textNormal" line):