Added in 1.7
/clearall [-agmnqstu]
Clears the buffer and Switchbar/Treebar unread color of the specified window type, if no type is specified, all windows on current connection is cleared.
Switches
| Switch | Description | 
| -a | All windows on all connections. | 
| -g | TODO | 
| -m | TODO | 
| -n | Channel windows. | 
| -p | Docking panels. | 
| -q | Query windows. | 
| -s | Status windows. | 
| -t | Dcc chat windows. | 
| -u | Custom windows. | 
Example
;Clear all channel and query windows /clearall -nq ;Clear all windows on current connection. /clearall