Visual Effect for a stack

[Peter Haworth]

I have a group on a card that is shown/hidden under user control at the
bottom of the card using push down/push up visual effects.  When the group
is shown, I first change the height of the stack by the group's height and
when it is hidden, I hide the group then set the height of the stack to its
original value.

All that works just fine but the group has the nice visual effect to it
when it's shown/hidden whereas the change in stack size is instantaneous.

I don't think there's a way to use a visual effect to deal with the stack
size change, or is there?

I have tried decreasing the height of the stack in small increments within
a repeat loop with varying wait times between each repeat but it always
looks jerky.

Any ideas?

Pete
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