1 files changed, 8 insertions, 1 deletions

diff --git a/design-notes.md b/design-notes.md
index 91764cc..d59f511 100644
--- a/design-notes.md
+++ b/design-notes.md
@@ -143,7 +143,14 @@ Serialised item structure:
   ],
 
   "path": "[resource path]",
-  "thumbnail": "[resource path | null]",
+
+  "thumbnail": null | {
+    "resource": "[resource path]",
+    "resolution": {
+      "width": 400,
+      "height": 200
+    }
+  },
 
 
   "_comment": "type-dependent",