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The Align menu
The align functions align the secondary selection objects with respect
to the primary selection. For instance, the align function Left
align moves every object in the secondary selection horizontally such
that its leftmost point coincides--i.e., lies on a vertical line--with
the leftmost point of the primary selection.
The functions available here are only the most basic align functions
imaginable. However, exactly because there are so many more
possibilities, all future align functions will have to be added as
Ipe user macros. The standard Ipe distribution, for instance,
contains Iums to align objects with
respect to the grid.