In Gmail , the default action when you click reply is to include all of the e-mail you’re replying to below your message. Sometimes this results in long reply chains and lots of irrelevant information being forwarded along. Suppose you don’t want to include all of the text, instead only the relevant ,just an important line or a picture .Improved Gmail web interface has the answer for that.
Gmail's fantastic feature is easy to use. Just highlight the text you want to be in the reply e-mail, and then click the reply button on Gmail’s interface. You’ll get a reply with just the highlighted information selected. See this example below of before and after.