Set Box Pad

  Determines whether box editing pads the area with spaces (in cutting a
  box) and overstrikes existing text (in pasting a box).

  Usage notes:

  o  By default, box padding is enabled. Thus, cutting a box, or erasing a
     box selection with pending delete, pads the area with spaces to keep
     the column alignment of text to the right of the box. Pasting or
     restoring a box overwrites existing text.

  o  If you disable box padding, then box editing depends on the mode of the
     buffer (as shown in the status line). Cutting a box from an insert-mode
     buffer makes text to the right of the box "collapse" to the left,
     closing the gap. Pasting or restoring a box into an insert-mode buffer
     pushes existing text to the right of the box.

  o  To override these effects, without changing your settings, use either
     BOX CUT INSERT and BOX PASTE INSERT, or BOX CUT OVERSTRIKE and BOX
     PASTE OVERSTRIKE.

  o  To save your setting for future editing sessions, use SAVE ATTRIBUTES
     to create a section file or to create or update a command file---see
     help on Attributes.

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  Related topics:

     Pending Delete    Ranges And Boxes    BOX CUT        BOX PASTE
     BOX SELECT        SET BOX NOPAD       SET BOX PAD    SET BOX SELECT