English

Briefly:
- create new macro, set name, icon and shortcut
- add new command
- Category: Chat
- Action: Talk to anybody
- Mode: Say (or team, guild...)
- enter any command or string you wish (as in chat line)
- save command
- save macro (and add to your bar)

a) you can insert more commands to one macro, so you can say something with one and do a gesture with next command

b) some gestures does a bit different thing when you have targeted someone or not, you might also use this command at first line:
- Category: Action
- Action: No target (or Target Self)