WindowTitle
Sets the title of the terminal window while this is in the composition.
When several are in the composition, the one composed last, which is usually the most deeply nested one, sets the title. When a WindowTitle leaves the composition, the title of the previous one applies again. Once none are left, or the program ends, the title the window had before is restored in terminals which support it.
The title is passed to the terminal as is, so control characters in it are not filtered.