Don't feel bad, Sarah. It took me a while to figure out how to do this. It actually is taking me longer to figure out how to explain it! Sorry Tom! For example I want a large, bold, purple delta. Here is how to do it:
[SIZE=8 ][B ][COLOR="purple" ][FONT=symbol ]D[/FONT ][/COLOR ][/B ][/SIZE ]
just eliminate the spaces
Another way {SIZE=8}{B}{COLOR="purple"}{FONT=symbol}D{/FONT}{/COLOR}{/B}{/SIZE} instead of {} use [].
I hope that this helps you!