Coffins are boxes which contain typeset material. Along with the box itself, the coffin structure holds information about the size and shape of the box, and alignment information in the form of a set of “poles” (horizontal and vertical lines at particular positions defined relative to the box). The points where these poles intersect are “handles”, which are the points used to define the placing of a coffin.

The package provides a design-level interface to the LaTeX 3 kernel functions which provide coffins.

The package is part of the l3experimental bundle.