diff --git a/doc/region-layer.png b/doc/region-layer.png new file mode 100644 index 0000000..90b0a33 Binary files /dev/null and b/doc/region-layer.png differ diff --git a/doc/regions.png b/doc/regions.png deleted file mode 100644 index 9c84489..0000000 Binary files a/doc/regions.png and /dev/null differ