Extend the multiple grids section

docs/guide/index.md

@@ -219,4 +219,7 @@ To connect multiple grids they need to have the same context. If you supply the
 
 ::: warning
 Items are not deleted from the source grid if moved to a different one. You have to build a mechanism for this yourself.
+Examples for such a mechanism can be found in Examples 4 and 5.
 :::
+
+To handle movements from one grid to another, the attributes `gridId` and `originGridId` of the event will help.