Yes, that "addFlexOf" thing seems to be the message I needed to add to get the morph to rotate. Forgive the naive question.

On Thu, Apr 25, 2019 at 9:19 AM K K Subbu <kksubbu.ml@gmail.com> wrote:
On 25/04/19 7:29 PM, Steve Quezadas wrote:
> I am trying to rotate an instance of a [Transformation morph]. I am
> sending an "angle:" message, which should work since "angle:" is listed
> as a method in it's parent class, yet when I sent a message, it claims
> "it does not understand #angle". Shouldn't messagepassing forward the
> message to it's parent class?

Did you mean "TransformationMorph"?

I just tried the one-liner below in Pharo 7 (64b Linux) and it worked

(TransformationMorph new asFlexOf: ('Hello' asMorph)) angle: (Float pi /
4); openInHand.

Regards .. Subbu