Ok to change your font click on the font style button at the top of your reply box. Then when the font list comes up click the Other Font button ...
OK now after you have clicked that you will get a grey box that comes up...
Ok inside that grey box where the words Arial, Geneva, Sans-serif are at, delete them, and type in the name of the font you want to use.
TIP: Make sure that you type the name of the font exactly, so if it has no spaces don't put spaces, if some letters are capatilized and not others make sure you do that. If you even get one little thing wrong it won't work. You have to have the font in your pc for this to work. When I am looking for a font to use I open my psp program and check the font list from there, that also gives me the exact way to type it in.
Hope this helps! Mindy