Performs the box operation specified by the option word on the box
    defined by the current selection.  The diagonally opposite corners
    of the box are given by the beginning and end positions of the
    selection.

    Format

      BOX   option

1 - COPY

    Copies the selected box, without removing it, to the default location
    (the DECwindows clipboard or paste buffer).

    Format

      BOX COPY

2 - CUT

    Cuts the selected box to the default location (the DECwindows
    clipboard or paste buffer).

    Format

      BOX CUT

 2.1 - Qualifier

 2. 1.1 - /PAD

    Indicates that the area of the cut is to be padded with spaces.

3 - DRAW

    This command draws a box in overstrike mode. The box is drawn using
    '+' for the corners, '|' for the sides and '-' for the top and bottom.

    Format

      BOX DRAW

4 - LOWERCASE

    Changes the case of the text in the selected box to be lowercase.

    Format

      BOX LOWERCASE

5 - PASTE

    This command pastes the contents of the default location (the DECwindows
    clipboard or paste buffer) to a box with its top left corner at the
    current cursor position.

    Format

      BOX PASTE

 5.1 - Qualifier

 5. 1.1 - /OVERSTRIKE

    Indicates that the paste is performed in overstrike mode, the
    default is insert mode.

6 - UPPERCASE

    Changes the case of the text in the selected box to be uppercase.

    Format

      BOX UPPERCASE