Hi Barbara,
Thank you Jax, but that wasn't my question. I said the person had replied in MY email (not a reply one- maybe they forwarded it back to me, I don't know) but the answers were by the side of my questions. I know how to change the font and the colour but not how to reply actually in the body of someone else's email.
It depends on what email client you are using. If Outlook, choose to
send a reply,
then check in the format menu 'html'
You can put your cursor in the body of the email and move it to put
your comments to selected paragraphs of the message, then select your
portions of the message and click the 'font color' icon, which is an A
with a red underscore, here you can choose the color.
Using Yahoo the principle is the same: you choose to reply, also
choose to use html, put your cursor in the body of the message where
you want, after writing select the passage and choose the font color
icon to change its color.
Hope this helps.