feat(admin): multi-select and delete rooms

1 files changed, 2 insertions, 1 deletions

diff --git a/building_guide/admin.md b/building_guide/admin.md
index d66aabe..951d4eb 100644
--- a/building_guide/admin.md
+++ b/building_guide/admin.md
@@ -270,7 +270,8 @@ even across sessions.
 The map page (`/`) is the main navigation hub:
 - Rooms are displayed as colored nodes on a 3D grid, connected by links (bars for two-way, arrows for one-way, X for blocked).
 - Click a room node to edit its properties (name, description, color, exits, objects, mobs, spawns).
-- **Drag** connections between rooms to create reciprocal exits. **Shift+drag** to create a one-way exit (only the exit from the source room is written; the target room is not modified).
+- **Drag** connections between rooms to create reciprocal exits. **Ctrl+drag** to create a one-way exit (only the exit from the source room is written; the target room is not modified).
+- **Shift+drag** draws a selection box to multi-select rooms (Shift+right-drag subtracts). **Right-click** any selected room for a context menu with **Delete** to remove all selected rooms at once. While a multi-selection is active, right-drag link removal is disabled; clear the selection first by clicking elsewhere or pressing Escape.
 - **Right-drag** between rooms to delete the exit (full reciprocal; the sidebar Exits tab has a "Remove reverse" button to convert a two-way exit to one-way).
 - If deleting an exit severs a room from the seed grid, the room moves to the "Disconnected Rooms" sidebar. Relink it via the Exits tab "Add" form with its ID and direction.
 - Right-click (or long-press) a room to delete it or access advanced options.