<pseqdown> is similar to <?pseqend> in that it marks a position in the text stream as the end of a page sequence (defined via the pseq macro). Where <pseqdown> differs, however, is that while <pseqend> signifies to PTC ALD that the next page sequence should be chosen if required, <pseqdown> will return to the previous sequence in the stack. <?pseqdown> will restore the saved state from the most recent <?psequp> command, if available.