+- ``HIDE_PROMPT``: hide prompt after receiving a tweet or not.\r
+\r
+- ``PREFIX``: display formated string of prompt.\r
+\r
+ + ``#me``: Your username with '@', only available in personal stream.\r
+ + ``#place``: List name, only available in list stream.\r
+ + ``#owner``: Owner of list name, only available in list stream.\r
+ + ``#keyword``: Keyword, only available on public stream.\r
+\r
+- ``SEARCH_TYPE``: search type in 'search' command ('mixed','recent','popular').\r
+\r