Imported trace image is degraded

[terrymac]

Artrage3 on Samsung 10.1 pad
I want to use a large jpeg of a black and white drawing on one layer. If I set it on as a tracing image, then set it to paint, the image is degraded and pixilated. If I import the image it appears very small in the centre, and dragging it to fill the layer causes it to degrade even further.
On the PC version this does not happen-I can either set it as a trace image or import the drawing directly, and quality is fine- however if I try "Import to layer" I only get the middle portion of the drawing and can't scale it down to fit

PS Ive just re read post
(If you go to the gallery and press the '+' in the top right you can import a picture to start a new painting entirely IT WORKS thank you!!