Three Queries - No.3. Can not cut a window.

[Jaeger1787]

Ladies and Gentlemen.

The face of the body towards you  should have three window openings and a recessed panel.  I created an inclined plane, and drew two windows and the panel.  I then attempted to mirror the left hand window, but find it can not be selected.  Why is this and what can I do to correct the inability?  Export file is attached.

Thank you.

[jeff_strater · Accepted solution]

It seems to work OK for me.  I was able to mirror both windows and the recess:

[Jaeger1787]

Excellent, many thanks Sir.  Actually, your answer solved another of my queries as well. 

Thanks again.  As a reasonably occasional user of Fusion, I find memory is not what is should be - too many senior moments I am afraid.

Keith