diff --git a/pwiz_tools/Skyline/Menus/SkylineControl.cs b/pwiz_tools/Skyline/Menus/SkylineControl.cs
index f7023fc601..7583bde65e 100644
--- a/pwiz_tools/Skyline/Menus/SkylineControl.cs
+++ b/pwiz_tools/Skyline/Menus/SkylineControl.cs
@@ -44,6 +44,8 @@ public SkylineControl(SkylineWindow skylineWindow) : this()
             SkylineWindow = skylineWindow;
         }
 
+        [Browsable(false)]
+        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
         public Helpers.ModeUIExtender ModeUiHandler
         {
             get { return modeUIHandler; }
@@ -55,12 +57,18 @@ private void InitializeComponent()
             modeUIHandler = new Helpers.ModeUIExtender(_components);
         }
 
+        [Browsable(false)]
+        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
         public SkylineWindow SkylineWindow { get; private set; }
+        [Browsable(false)]
+        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
         public SrmDocument DocumentUI
         {
             get { return SkylineWindow?.DocumentUI; }
         }
 
+        [Browsable(false)]
+        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
         public SrmDocument Document
         {
             get { return SkylineWindow?.Document; }
@@ -71,22 +79,30 @@ public void ModifyDocument(string description, Func<SrmDocument, SrmDocument> ac
             SkylineWindow.ModifyDocument(description, null, act, null, null, logFunc);
         }
 
+        [Browsable(false)]
+        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
         public IdentityPath SelectedPath
         {
             get { return SkylineWindow?.SelectedPath; }
             set { SkylineWindow.SelectedPath = value; }
         }
 
+        [Browsable(false)]
+        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
         public SequenceTree SequenceTree
         {
             get { return SkylineWindow.SequenceTree; }
         }
 
+        [Browsable(false)]
+        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
         public TreeNodeMS SelectedNode
         {
             get { return SkylineWindow.SelectedNode; }
         }
 
+        [Browsable(false)]
+        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
         public int SelectedResultsIndex
         {
             get