How do I do with(self) something and with(Character ID) do something please?

How do I code properly in Stencyl Programming Language something like

Code: [Select]

with(self)
{
  if (keyboard_check_pressed(ord("Q")))
  {
    x += 28;
  }
}
and also

Code: [Select]

with(Heather ID 2)
{
  if (keyboard_check_pressed(ord("Z")))
  {
    y += 178;
  }
}
please? Thank you so very much in advance.