How are the common penalties signalled?

Signals from the Referee's Signals pages of the Playing Rules:

• Boarding: strike the clenched fist of one hand into the open palm of the other in front of the chest.
• Charging: rotate clenched fists around one another in front of the chest.
• Cross-checking: forward and backward motion of both clenched fists, extending from the chest about one foot.
• Butt-ending: a cross motion of the forearms, one moving under the other.
• Checking from behind: forward motion of both arms, palms open and facing away, fully extended from the chest at shoulder level.
• Clipping/tripping: strike the leg below the knee with either hand in a front-to-back motion, keeping both skates on the ice.
• Slew-footing: the same motion, but back-to-front.
• Hooking: a tugging motion with both arms as if pulling something from in front toward the stomach.
• Holding: clasp either wrist with the other hand in front of the chest.
• Holding the stick: the holding signal followed by a signal that you are holding a stick with two hands in a normal manner.
• High-sticking: both fists clenched, one immediately above the other at forehead height.
• Head contact: pat the flat (open palm) of the non-whistle hand on the side of the head.
• Interference: cross arms stationary in front of the chest.
• Kneeing: slap either knee with the palm, keeping both skates on the ice.
• Roughing: clenched fist with arm extended out to the front or side.
• Slashing: a chopping motion with the edge of one hand across the opposite forearm.
• Spearing: a jabbing motion with both hands thrust out in front of the body, then dropped to the sides.
• Too many players: six fingers (one hand open) in front of the chest.
• Unsportsmanlike conduct/diving: both hands forming a 'T' in front of the chest.
• Misconduct: both hands on hips.
• Match penalty: pat the flat of the hand on top of the head.
• Delayed calling of penalty: extend the non-whistle arm fully above the head.