phamason2003, welcome to GreekChat.
You're close to having the signature code correct, but you also need to complete the tags at the other end.
In other words, for every time you use font=symbol in those square brackets and then put the text that you want to have displayed in that font, you must then close the tag to with /font between square brackets or /color etc etc.
The signature code of course goes in the relevant section of the options in the user control panel.
If you get stuck further help is available in the threads linked to a few posts up from yours in this thread.
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