A frame has many parameters that control its appearance and behavior. Just what parameters a frame has depends on what display mechanism it uses.
Frame parameters exist mostly for the sake of graphical displays.
Most frame parameters have no effect when applied to a frame on a text
terminal; only the
buffer-predicate parameters do something special. If the
terminal supports colors, the parameters
display-type are also meaningful. If the terminal supports
frame transparency, the parameter
alpha is also meaningful.