diff --git a/src/view.cpp b/src/view.cpp
index 2c6af50..bb7d72b 100644
--- a/src/view.cpp
+++ b/src/view.cpp
@@ -184,11 +184,11 @@ bool applyMode(ViewModeModel& model, const std::string& targetModeId, ReaProject
         model.clearSnapshot(guid);
     }
 
-    // PARENT VISIBILITY (derived, never parked): a folder is visible iff at least
-    // one of its descendant leaves is visible in the target mode. That derivation is
-    // pure (membership + active mode), so it is recomputed every toggle rather than
-    // snapshotted — the four leaf-park flags don't apply to parents. Drive only the
-    // two visibility flags; never touch B_MAINSEND/I_FXEN/FX-offline on a parent.
+    // PARENT VISIBILITY (never parked): visibleTracks() marks a parent visible when
+    // a descendant leaf is visible in the target mode OR the parent belongs to the
+    // mode by its own membership (untagged folder → Arrange default). Recomputed
+    // every toggle rather than snapshotted. Drive only the two visibility flags;
+    // never touch B_MAINSEND/I_FXEN/FX-offline on a parent.
     std::set<std::string> visible = model.visibleTracks(tree, targetModeId);
     for (const FolderNode& node : tree.nodes) {
         if (!node.isParent) continue;