diff --git a/osu.Game/Screens/Edit/Compose/Components/BlueprintContainer.cs b/osu.Game/Screens/Edit/Compose/Components/BlueprintContainer.cs
index 4b98d42c7c..df9cadebfc 100644
--- a/osu.Game/Screens/Edit/Compose/Components/BlueprintContainer.cs
+++ b/osu.Game/Screens/Edit/Compose/Components/BlueprintContainer.cs
@@ -337,6 +337,7 @@ namespace osu.Game.Screens.Edit.Compose.Components
         /// <returns>Whether a selection was performed.</returns>
         private bool beginClickSelection(MouseButtonEvent e)
         {
+            // Iterate from the top of the input stack (blueprints closest to the front of the screen first).
             foreach (SelectionBlueprint blueprint in SelectionBlueprints.AliveChildren.Reverse())
             {
                 if (!blueprint.IsHovered) continue;
diff --git a/osu.Game/Screens/Edit/Compose/Components/HitObjectOrderedSelectionContainer.cs b/osu.Game/Screens/Edit/Compose/Components/HitObjectOrderedSelectionContainer.cs
index ae50b0fd61..9e95fe4fa1 100644
--- a/osu.Game/Screens/Edit/Compose/Components/HitObjectOrderedSelectionContainer.cs
+++ b/osu.Game/Screens/Edit/Compose/Components/HitObjectOrderedSelectionContainer.cs
@@ -6,9 +6,13 @@ using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Objects;
 
 namespace osu.Game.Screens.Edit.Compose.Components
 {
+    /// <summary>
+    /// A container for <see cref="SelectionBlueprint"/> ordered by their <see cref="HitObject"/> start times.
+    /// </summary>
     public sealed class HitObjectOrderedSelectionContainer : Container<SelectionBlueprint>
     {
         public override void Add(SelectionBlueprint drawable)