window-name

    Specifies the name of the window you are defining. If a window
    definition with that name already exists, it is canceled in favor
    of the new definition.

 start-line

    Specifies the starting line number of the window. This line
    displays the window title, or header line. The top line of the
    screen is line 1.

 line-count

    Specifies the number of text lines in the window, not counting
    the header line. The value must be at least 1. The sum of start-
    line and line-count must not exceed the current screen height.

 start-column

    Specifies the starting column number of the window. This is the
    column at which the first character of the window is displayed.
    The leftmost column of the screen is column 1.

 column-count

    Specifies the number of characters per line in the window. The
    value must be at least 1. The sum of start-column and column-
    count must not exceed the current screen width.