Publisher 1.7.2.471. (I don’t know if this ability will be in later versions.)
Here’s a strange little workflow to give you the ability to add multiple effects of the same type to some still-editable text.
* Create some text on a master spread;
* Go to the normal page;
* Go to the Layers panel;
* Right click the master spread layer and choose Edit Detached;
* Add some glow effects to the text layer;
* Press the Finish button on the red editing bar at the top of the document;
* Go to the master spread;
* Add some glow effects to the text layer.
You now have multiple effects of the same type added to the text while it is still editable.
My example GIF shows two Outer Glows and two Inner Glows on the same piece of text.
I’m not sure how many times anyone might want to do this but it might come in useful to someone at some point.