Press one of the mode buttons,
B
I
U
<span style='font-family:Times'>Font </span>
<span style='font-size:14pt;line-height:100%'>Size</span>
<span style='color:red'>Color</span>
.. and a seperate window will display a text entry box to insert text. Enter your message and press OK. The["B"]Your Text["/B"] will be displayed in your message making the text between the bracketed B's Bold
:-)