Hi Randall - thanks for your question. I am going to move it to the PADS specific community where it will receive greater visibility. This space is for general community questions and suggestions.
I'm sorry if I posted my questions in the wrong place but this is a little new to me. And the job is in Xpedition VX.2. It's not a PADS database.
Randall - Not a problem at all. Mew members sometimes post product questions in the Members Resources space. Thanks for clarifying that it is Xpedition -- I was guessing on the product. I will move right now. Also - I unmarked my response as a correct answer. I don't want other members to think your question is answered by my response when it isn't.
I haven't worked with negative for a while, but I was hoping that "Place Thermal Override" would work, but it doesn't seem to with negative planes (I hope I am wrong on this). You will have to change the the plane thermal for this padstack. Go to >Setup>Libraries>Padstack Editor, find the padstack, and change the "Plane thermal" to "(Buried Thermal)"