MODE

Usage: MODE <#channel|nick> <+|-><modes> [<params>]
MODE sets modes on channels and users. For more information on modes you can look under Channel Modes (CMODE) or User Modes (UMODE).
Examples:
/hs cmode
/hs umode
/mode #movies +o SeanConnery
/umode +m
Note: instead of /MODE <yournick> <modes>, you can also use /UMODE <modes>.