^ from my experience, same arrangement works for L (a4) size tablets as well.
there's another option, keeping your tablet to the right (for right-handed users) or to the left of the keyboard, which also is supposed to reduce elbow strain if you experience it
but it wasn't really comfortable for me;
also newer users will have less coordination issues if tablet is placed directly in front of the screen.
on the fourth day of glitchmas my painter™ gave to me
four random crashes, three broken brushes, two system hangups & one corrupted workspace