How DO you make a quote??? And what's with the "append signature to post"???
Do you see the word "quote" on the upper right side of the message you are reading? That is the "quote" command or icon. Left-click on it and you will see the message not in quotes but with a line above and below it. Then write your message below the line and finally left click on for example "Post Reply" at the bottom right of the message your are working on
I don't know about the "append signature to post" command. I am not even sure what it means.