Toggles the window shade feature for titled windows. Windows in the shaded state only display a title-bar. If bool is not given or "toggle", the window shade state is toggled. If bool is "True", the window is forced to the shaded state. If bool is "False", then the window is forced to the non-shaded state. To force shading in a certain direction, the direction argument can be used. Any of the strings "North", "South", "West", "East", "NorthWest", "NorthEast", "SouthWest", "SouthEast" or "Last" can be given. The direction can be abbreviated with the usual one or two letters "N", "NW", etc. Using a direction on a window that was already shaded unshades the window. To shade it in a different direction, use the ShadeAgain option. The direction Last shades the window in the direction it last was shaded. If the window has never been shaded before it is shaded as if no direction had been given. Windows without titles can be shaded too. Please refer also to the options WindowShadeSteps, WindowShadeShrinks, WindowShadeScrolls, WindowShadeLazy, WindowShadeAlwaysLazy and WindowShadeBusy options of the Style command. Examples:

Style * WindowShadeShrinks, WindowShadeSteps 20, \
        WindowShadeLazy
Mouse 1 - S WindowShade North
Mouse 1 [ S WindowShade West
Mouse 1 ] S WindowShade E
Mouse 1 _ S WindowShade S

Note: When a window that has been shaded with a direction argument changes the direction of the window title (see TitleAtTop Style option), the shading direction does not change. This may look very strange. Windows that were shaded without a direction argument stay shaded in the direction of the title bar.

For backward compatibility, the optional argument may also be 1 to signify "on", and 2 to signify "off". Note that this syntax is obsolete, and will be removed in the future.