I'll use your post as an example.
When you click the "Post Reply" button, drag the mouse over the portion of their text you want to italicize.
Then do the Control-C to copy it, and put the cursor in the "Your Reply" box on the screen, and hit Control-V to paste that text.
That's the easy part, now comes the tricky part.
You need to enclose their speech in an html italics marker.
To do this, just before their quote, enter the characters :
<i>
and just after their quote, enter the characters:
</i>
So the text of yours in italics above was created by entering the following into the "Your Reply" field:
<i>ps to everyone; How do you put the comment you are replying to in italics? Or is there a quick button to quote someone? Thanks in advance.</i>
If there are paragraphs, you put the following at the end of each paragraph:
<p>
and you put the <i> before the paragraph, and between the text and the </i> after the paragraph and before the <p>, so your text above (if written as a paragraph) would look like this:
<i>ps to everyone; How do you put the comment you are replying to in italics? Or is there a quick button to quote someone? Thanks in advance.</i><p>
Cheers!
Very nicely done.
How did you get your html stuff to show up instead of being interpreted?