Here are some of the commands that you dont find in Alt+Y:/breakguild [Guild Name] - Disband a guild.
/bv [0-127] - Adjusts the BGM volume.
/camera - Toggles camera zooming on and off.
/emblem - Toggles your guild emblem on and off
/ex [Character name] - Ignores the specified character.
/expel [Character name] - Will remove a character from the party, if you are the party leader.
/font - Sets character and guild/party name on top or bottom of character.
/guild [Guild name here] - Creates a Guild, if you have an Emperium.
/guildchat [Text here] - Types in guild channel.
/in [Character name] - Un-ignores the specified character.
/itemsnap - Snaps your cursor to pick up items on or off.
/organize [Your party name here] - Allows you to create a party.
/skillsnap - Snaps the skill cursor on or off.
/skip - Toggles frame skip on and off.
/snap - Snaps the battle cursor on or off.
/v [0-127] - Adjusts the sound effect volume.
There are more but I kinda forgot...
the one to reduce effects without remove them
/mineffect
Fingers are
CTRL + -
CTRL + =
CTRL + \
and thats as far as i know about the hands/fingers.
Also /gawi, /bawi and /bo respectively. =p (Oh snap 2 of them are showing at forum o.o)
/e20 and /e27 ~ /e33 are the new emoticons.