/BUFFER [clear|close|close_all|purge]
 /BUFFER [top|bottom|date|%|search_backward|search_forward]
 /BUFFER [scroll_lock|scroll_unlock|scroll_toggle]

Buddy's buffer manipulation command.  Eg. you can search through buffer for "text", clear chat window etc.

/buffer clear
 Clear the current buddy chat window
/buffer close [jid]
 Empty all contents of the buffer and close the current buddy chat window
/buffer close_all
 Empty all contents of the chat buffers and close the chat windows
/buffer purge [jid]
 Clear the current buddy chat window and empty all contents of the chat buffer
/buffer top
 Jump to the top of the current buddy chat buffer
/buffer bottom
 Jump to the bottom of the current buddy chat buffer
/buffer up [n]
 Scroll the buffer up [n] lines (default: half a screen)
/buffer down [n]
 Scroll the buffer down [n] lines (default: half a screen)
/buffer date [date]
 Jump to the first line after the specified [date] in the chat buffer (date format: "YYYY-mm-dd")
/buffer % n
 Jump to position %n of the buddy chat buffer
/buffer search_backward text
 Search for [text] in the current buddy chat buffer
/buffer search_forward text
 Search for [text] in the current buddy chat buffer
/buffer scroll_lock
 Lock buffer scrolling
/buffer scroll_unlock
 Unlock buffer scrolling
/buffer scroll_toggle
 Toggle buffer scrolling (lock/unlock)