Lock preview view to local scene

README.md

@@ -26,10 +26,11 @@ right-clicking with an empty hand. Sneak-right-click with an empty hand to take
 the book back and restore the vanilla lectern. Breaking a Book Stand drops both
 the stored book and a vanilla lectern.
 
-Bound Linking Books request a server-validated 9-by-128-by-9 snapshot around
-their destination and render its blocks as a rotating Ponder scene on the left
-page, backed by the destination biome's sky color. The snapshot is visual only;
-the server independently validates every link.
+Bound Linking Books request a server-validated 9-by-64-by-9 snapshot around
+their destination. The book renders a fixed 9-by-7-by-9 window centered on the
+link point as a rotating Ponder scene on the left page, backed by the
+destination biome's sky color. The snapshot is visual only; the server
+independently validates every link.
 
 ## Requirements