Middle-Joint
Finger Movement Symbols

huh?	milk	Middle-Joint Squeezes (Closes) When the middle-joint of the finger squeezes or closes (bends down or in), it is written with a dark dot. One dark dot means "squeeze once". Two dark dots mean "squeeze twice".
eleven	understand	Middle-Joint Flicks (Opens) When the middle-joint of the finger flicks opens (bends up or out), it is written with a hollow dot. One hollow dot means "flick once". Two hollow dots mean "flick twice".