I'm not familiar with such an effect (one might exist, but I'm not
familiar with it). There are a couple of work-arounds I can think of.
The simplest one would be to have a duplicate object that is in front
and apply an entrance effect (such as Appear) to that. When you play the
slideshow, no one would know that you had two objects.
--David
--
David M. Marcovitz
Associate Professor, Loyola University Maryland