[Insight-developers] Any way on Gerrit to see patch-to-patch diffs?

[kent williams]

There have been a few topics I've reviewed that go through several
iterations before they're approved, and one big thing that's missing for me
is a patch-to-patch diff.  I can't tell when a new patch is pushed what's
changed from the last patch.

Is there a way to do this or is this yet another thing that would be nice to
see added to Gerrit.