Norm Schutzkus wrote:
Hello, you redefined "N" as 20*rpm. "N" is a predefined unit already in MC.
Define "your N" with a subscript and the unit you are looking for will become blue.
In fact thats not abslutely necessary because contrary to Mathcad 15 and below the definition of N as 20*rpm in Prime does not overwrite the units Newton. But Prime has two different N's to chose from and guesses wrong when it tries to determine which want was meant by the author. And its generally not a bad idea to assume that the author meant the variable which he himself had defined.
You may simply select the black N and use the "Labels" option in the "Math" ribbon to change the label from "Variable" to "Unit".