Below is the example of what the message will look like when you edit the page via "source edit mode":
== Help needed == <--- This is what the subject of the message will look like.
Hi, I need help on editing the [[Earth]] article? Can you assist? [[User:Example|Example]] ([[User_talk:Example|talk]]) <--- This is what the initial message will typically look like. Notice the signature is left at the very end.
:Sure! What do you need help with? [[User:CASSIOPEIA|CASSIOPEIA]] ([[User_talk:CASSIOPEIA|talk]]) <--- This reply will be indented because a colon (:) was added to the beginning of the reply.
::I need know how to add inline citation/source. [[User:Example|Example]] ([[User_talk:Example|talk]]) <--- An additional response is indented with two colons in order to indent this reply to the previous response above.


Here is the resulting text:

Help needed edit

Hi, I need help on editing the Earth article? Can you assist? Example (talk)

Sure! What do you need help with? CASSIOPEIA (talk)
I need know how to add inline citation/source. Example (talk)