Knuth designed his original fonts with tabular figures (figures whose width is uniform); this makes some layout problems rather simple. In more recent times, fonts (such as Minion Pro), which offer proportionally spaced figures, are increasingly being used.

The package provides mechanisms whereby such proportional figures may still be aligned in tabular style (for example, in the table of contents).

The author is Michael Ummels. The package is Copyright © 2011 Michael Ummels.