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### 28.4 Frame Parameters

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 `height`, `width`, `name`, `title`, `menu-bar-lines`, `buffer-list` and `buffer-predicate` parameters do something special. If the terminal supports colors, the parameters `foreground-color`, `background-color`, `background-mode` and `display-type` are also meaningful. If the terminal supports frame transparency, the parameter `alpha` is also meaningful.