### 20.1.6.3 Packer Options

For more extensive information on the packer and the options that it can take, see the man pages and page 183 of John Ousterhout's book.

anchor
  Anchor type. Denotes where the packer is to place each slave in its parcel.

expand
  Boolean, `0` or `1`.

fill
  Legal values: `'x'`, `'y'`, `'both'`, `'none'`.

ipadx and ipady
  A distance - designating internal padding on each side of the slave widget.

padx and pady
  A distance - designating external padding on each side of the slave widget.

side
  Legal values are: `'left'`, `'right'`, `'top'`, `'bottom'`.