Replies to the conversation will look like this. They can be typed into the text area below the post.
Don’t worry too much about the various buttons in the editor (e.g. “B” “I” “Link” “b-quote” etc.) if you don’t know what they mean. They can be used to spruce up your post with formatting, and some of the commands are in the “not so user friendly” HTML language.
Here is a useful guide if you are looking for general tips on forum use and etiquette:
Rules of Etiquette