i dont think you can.
but heres a shortcut.
you can go to templates.
and creat a new template
but you have to manually go to options each time after or before you type your message and go to templates and insert the one you made and it will be there like a signature.
you cant get one on the matrix's either =/
but i do that with the templates osmetimes when i have time but if i am rushing or am being lazy i dont
