# Glue (leaf)

A piece of filler for spacing other objects. Glue displays using the background color, BgColor. (To use the foreground color, use a Bar component.) Unlike Fill, Glue has specified size and no stretchability in the principal direction (horizontal or vertical) of its parent.

Main
  (Size, `1 + 0 - 0`)
  The size and stretchability in the principal direction of its parent.

Shape
  The principal direction is explicitly specified; the other direction has zero preferred and minimum size and is infinitely stretchable, thereby taking on the parent's shape.
Notes
  Must be a child of a horizontal or vertical split (`HBox`, `HVTile`, `VBox`, or `VTile`).
See Also
  Fill