Drawing to MTKView, then resizing

Learning Swift and Metal has been very challenging for me. It's taken me two years to get this far with my app and I am finally to the point where I'm asking questions. I'm even open to hiring someone who can help me.

I have been trying to build a drawing app that uses the Apple Pencil. It is working pretty well, but one feature that I would like to have is the ability to resize and move what I have drawn on screen. I have achieved this by using a pinch and a pan gesture recognizer. This works great, however after resizing, when I continue drawing, I can no longer draw on the entire screen. I can only draw within the boundaries of the now smaller resized MTKView. Is there a way to maintain the screen size on the drawing area but only scale and move the drawing elements?

For the drawing process, I am using drawPrimitives and present.currentDrawable with UITouch events.
I just realized I could copy the newly resized drawing into a new view. I would delete my question if I could.
Drawing to MTKView, then resizing
 
 
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