diff --git a/future-plans.md b/future-plans.md
index 1e60756..d8fa3b9 100644
--- a/future-plans.md
+++ b/future-plans.md
@@ -186,6 +186,22 @@ entries have no URL state — refreshing loses context.
 
 ## Grids
 
+### Grid view layers
+Allow a storage grid to reference one or more separate "view layer" grids that share
+the same logical layout but use different source images. Example: the storage grid
+uses close-up photos of individual cells for identification, while a view layer uses
+a wider photo of the lid or top side for orientation.
+
+Key design points:
+- Grids get a classification: `storage` (can hold inventory) or `view` (display
+  only, referenced by storage grids)
+- View layers may use a different panel sub-grid layout (fewer, larger panels) as
+  long as the final logical row×col count matches the storage grid
+- In the grid viewer, layers can be toggled to switch between the storage view and
+  any attached view layers
+- A storage grid can have multiple view layers (e.g. lid photo, tray photo, labeled
+  overlay)
+
 ### Multi-cell grid storage selection
 A component stored in a grid should be able to span multiple cells, since larger
 parts often occupy more than one cell. The graphical cell picker in the inventory