Hi Matt
Thanks, I will try turning off natural arrangements.

The term "Power Chord" is generally accepted when speaking. I assume C5, D5,... is the standard when writing a lead sheet, for example.

When reading standard notation, what one would call it is of little importance, as it is just two notes to be played.

Standard notation, in many cases, is not so standard. There are way too many symbols to describe the same thing.

The power chord concept arose as I learned new information by being aware of the intervals involved, specifically one to the fifth or five to the one, an interval of 5 and 4. That sounded different, and I was trying to understand why from a technical perspective.
Thanks,

Billy