Editing signature

When I am editing my signature I can't get the font to change to font I want to use. How do I get the font to change.

Which font would you like?

I went to EDIT SIGNATURE , FONTS , then I selected IMPACT and my signature is what you see here at the bottom which is not IMPACT. What am I doing wrong.

You entered the code incorrectly, you did this:

[FONT="Impact"][ /FONT]Signature[FONT="Impact"][ /FONT]

When the correct way was this:

[FONT="Impact"]text goes here [ /FONT]

I left a space before the slash on the correct method so i could demonstrate for you.