I can view them all but can't seem to select them all.  I know how to select all messages in a conversation, but  sometimes I want to either delete them all or file them in a subfolder, but I can't find a way to select them all.  All I can do is go through my in-box and command click each one and then drag to a sub-folder which is time consuming.  Surely if I can view every message in a conversation there must be a way to then select/move them all at once - any ideas?