I've been investigating with text.
<div><br></div><div>I found things that do work like:</div><div><br></div><div><div>((Text withAll: &#39;foo&#39;) , (Text string: &#39;*&#39; attribute: (TextAnchor new anchoredMorph: EllipseMorph new)) , (Text withAll: &#39;bar&#39;)) asMorph openInWorld.</div>

<div><br></div><div>((Text withAll: &#39;foo&#39;) , (Text string: &#39;*&#39; attribute: (TextAnchor new anchoredMorph: ThemeIcons confirmIcon)) , (Text withAll: &#39;bar&#39;)) asMorph openInWorld.</div></div><div><br>
</div>
<div>But doing:�</div><div><br></div><div>((Text withAll: &#39;foo&#39;) , (Text string: &#39;some link&#39; attribute: (TextURL new url:&#39;<a href="http://philippeback.eu">http://philippeback.eu</a>&#39;)) , (Text withAll: &#39;bar&#39;)) asMorph openInWorld.</div>

<div><br></div><div>gives me a nice purple &#39;some link&#39; bit but clicking on it fails with</div><div><br></div><div>MessageNotUnderstood: TextURL&gt;&gt;actOnClick:for:in:editor:</div><div><br></div><div>Damn! Ideas on how to tackle this?</div>

<div><br></div><div>TIA</div><div>Philippe Back</div>