Before
(GraphicsLayer
  (anchor 0.00 0.00)
  (bounds 800.00 5016.00)
  (children 1
    (GraphicsLayer
      (bounds 800.00 5016.00)
      (contentsOpaque 1)
      (tile cache coverage 0, 0 800 x 1024)
      (tile size 800 x 512)
      (top left tile 0, 0 tiles grid 1 x 2)
      (in window 1)
      (children 1
        (GraphicsLayer
          (position 8.00 8.00)
          (bounds 100.00 5000.00)
          (usingTiledLayer 1)
          (contentsOpaque 1)
          (drawsContent 1)
          (tile cache coverage 0, 0 100 x 1024)
          (tile size 512 x 512)
          (top left tile 0, 0 tiles grid 1 x 2)
          (in window 1)
        )
      )
    )
  )
)


After
(GraphicsLayer
  (anchor 0.00 0.00)
  (bounds 800.00 5016.00)
  (children 1
    (GraphicsLayer
      (bounds 800.00 5016.00)
      (contentsOpaque 1)
      (tile cache coverage 0, 2560 800 x 1536)
      (tile size 800 x 512)
      (top left tile 0, 5 tiles grid 1 x 3)
      (in window 1)
      (children 1
        (GraphicsLayer
          (position 8.00 8.00)
          (bounds 100.00 5000.00)
          (usingTiledLayer 1)
          (contentsOpaque 1)
          (drawsContent 1)
          (tile cache coverage 0, 2560 100 x 1536)
          (tile size 512 x 512)
          (top left tile 0, 5 tiles grid 1 x 3)
          (in window 1)
        )
      )
    )
  )
)
Tall tiled layer