James O'Brien-3 wrote

I would like to use a SimpleButtonMorph that, when clicked on, will cause some text to appear in a TextMorph. Any suggestions on how to do this?

If you mean an existing TextMorph, see SimpleButtonMorph's class comment. There is an example that you can easily adapt.

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James O'Brien-3 wrote

SimpleButtonMorph's class comment, would the target be the TextMorph? If so, how is the correct TextMorph identified if there are two or more of them?

Yes, you'd need access to the TextMorph instance, and write something like: button := SimpleButtonMorph newWithLabel: 'change text'. button target: tm; actionSelector: #contents:; arguments: #('new text'); openInWorld

If you didn't create the TextMorph and can't get access to it, you can find it by searching through the world's submorphs (recursively if nec.)

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