diff --git a/Design:-Library-Sidebar.md b/Design:-Library-Sidebar.md
index a8877a5..30ad83a 100644
--- a/Design:-Library-Sidebar.md
+++ b/Design:-Library-Sidebar.md
@@ -206,6 +206,8 @@ Some ascii art for the sidebar layout.
 3. path/file select boxes - normal file browser type behaviour
 4. import button - when clicked will import the selected entry.
 
+**ToDo:** should there be a preview pane? Maybe the path/file boxes should collapse into one tree and use the second box for preview.
+
 The 'import' button behaviour will depend on the current editor state:
 
  - in 'normal' mode, import will import the selected flow, or the node of the appropriate type.