Window Commands

clear	Scrolls up the text in the window and fills the window with blank lines; you may want to use this to make new text start at the top of the window again.
lastlog	Searches the active window for a pattern and displays the result.
layout	Saves the layout of your window configuration; the next time you connect to the server, you will join the channels in the same window as before. …
scrollback	Manipulate the text in the window to go to a to the given line number, or clear the buffers. …
window	Manipulates the window layout and positioning attributes.