Can I paint in full resolution and 100% zoom on iPad?

[Elado]

I'd like to paint as if I were holding a real canvas the size of my iPad, but can't get ArtRage to do that.
I'm using ArtRage Vitae on an 11-inch iPad Pro.
My device's native resolution (held horizontally) is 2388x1668 pixels.
When I create a canvas at this resolution, ArtRage automatically zooms out to show a scaled-down view of my canvas.
It seems like if I want to paint on a canvas that fits my screen exactly and fills it up completely at 100% zoom, I have to make the canvas size 1194x834 (exactly half of my native resolution).
How can I paint on a full screen at full resolution and 100% zoom?