Question: Cartesian unit vectors

Hello, I am working on an elektromagnetism assignment, and have hit a slight problem with the Physics[Vectors] package. The cartesian unit vectors are set to i, j and k. but at my school we have always used x, y and z for both the cartesian unit vectors and the cartesian coordinates. Is there a way to change this so that i am able to use _x, _y and _z istead?

 

P.S. This is my first post so sorry if it is badly done.

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