diff --git a/README.md b/README.md
index b448b22..64d2693 100644
--- a/README.md
+++ b/README.md
@@ -48,8 +48,9 @@ positions and sizes, wander radius, calibration readouts. Marker print size stay
   (5 mm snap, green arrow = height) for anchors, occlusion buildings, and spawn points —
   spawn Y is fully editable so ghosts can live at any height. Anchors render through the
   exact same `anchorWorldMatrix` the AR pipeline uses, each with a white orientation arrow;
-  compass rose on the grid (N = +Z = back of table). Top-view button, property panel,
-  save/reset-to-seed.
+  compass rose on the grid (N = +Z = back of table). Table dimensions (width × depth + origin
+  offsets) render as an orange outline with cm labels in the editor and on the placement plan.
+  Top-view button, property panel, save/reset-to-seed.
 - **Placement plan printer** (`/admin/plan.html`): to-scale top-down plan of the whole
   layout — at 1:1 the actual crest patterns print true-size in position, so you can tape
   the sheets to the table and the markers are already placed. Tiles across A4/A3 with