Yes. In the Document Rules.
Here I have one action that sets the Description for various aspects of the configured part.
The expression is:
OrderDtl.LineDesc = Inputs.edtPartDesc.Value;
JobHead.PartDescription = Inputs.edtPartDesc.Value;
DemandDetail.LineDesc = Inputs.edtPartDesc.Value;
Part.PartDescription = Inputs.edtPartDesc.Value;
QuoteDtl.LineDesc= Inputs.edtPartDesc.Value;
You can select the target entity from the upper left pane:
BTW - Inputs.edtPartDesc.Value
is an input on my Configurator entry. It is dynamically created when the other inputs change. This way I can show it on the configurator entry window, and then use it to update the PartDescription.