Using special characters in QT dialogs

I have a dialog where I would like to use the correct symbols for the name of a report and also in the columns of the report. The correct thing would be to use The greek symbol Delta (a triangle) followed by an e. In HTML this is very simple to do with Δe but I have not found a way to do this in QT. In designer how do I enter the Delta charater?

"Δe" works for a QLabel in RichText mode, while cut & paste from a KCharSelect seems to work for all widgets.

The KCharSelect idea worked. Thanks