diff --git a/source/main.adb b/source/main.adb
index 7a8dcbc..965eb80 100644
--- a/source/main.adb
+++ b/source/main.adb
@@ -146,9 +146,9 @@ begin
 		--
 		world.draw (preview_x, preview_y, preview_width - 2 * preview_x, preview_height - 2 * preview_y - 32, core.signal_mode = core.signal_code'pos (core.signal_g));
 		--
-		core.draw_central_grid (preview_x, preview_y, preview_width - 2 * preview_x, preview_height - 2 * preview_y);
-		core.draw_squared_grid (preview_x, preview_y, preview_width - 2 * preview_x, preview_height - 2 * preview_y);
-		core.draw_hexagon_grid (preview_x, preview_y, preview_width - 2 * preview_x, preview_height - 2 * preview_y);
+		--~core.draw_central_grid (preview_x, preview_y, preview_width - 2 * preview_x, preview_height - 2 * preview_y);
+		--~core.draw_squared_grid (preview_x, preview_y, preview_width - 2 * preview_x, preview_height - 2 * preview_y);
+		--~core.draw_hexagon_grid (preview_x, preview_y, preview_width - 2 * preview_x, preview_height - 2 * preview_y);
 		--
 		ui.draw_menu      (0,             0, preview_width, preview_height - 32, false);
 		ui.draw_tiny_menu (preview_width, 0, side_panel,    preview_height - 32, true);