diff --git a/AnimationEditor/AnimationEditor.csproj b/AnimationEditor/AnimationEditor.csproj
index 41887ef..3e76b53 100644
--- a/AnimationEditor/AnimationEditor.csproj
+++ b/AnimationEditor/AnimationEditor.csproj
@@ -67,6 +67,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Modifications\AddAnimation.cs" />
+    <Compile Include="Modifications\AddSprite.cs" />
     <Compile Include="Modifications\RemoveAnimation.cs" />
     <Compile Include="Modifications\RemoveSprite.cs" />
     <Compile Include="Modifications\RemoveFrame.cs" />
diff --git a/AnimationEditor/Form1.cs b/AnimationEditor/Form1.cs
index a0fdbd9..86b0480 100644
--- a/AnimationEditor/Form1.cs
+++ b/AnimationEditor/Form1.cs
@@ -608,8 +608,8 @@ namespace AnimationEditor
         private void ReadSpriteOffset()
         {
             reading = true;
-            spriteXPosBox.Value = (int)currentFrame.Sprites[frameSpriteListBox.SelectedIndex].Offset.X;
-            spriteYPosBox.Value = (int)currentFrame.Sprites[frameSpriteListBox.SelectedIndex].Offset.Y;
+            spriteXPosBox.Value = (int)frameSprites[frameSpriteListBox.SelectedIndex].Offset.X;
+            spriteYPosBox.Value = (int)frameSprites[frameSpriteListBox.SelectedIndex].Offset.Y;
             reading = false;
         }
 
@@ -638,10 +638,10 @@ namespace AnimationEditor
         private void addSpriteToFrameSpritesButton_Click(object sender, EventArgs e)
         {
             var spriteToAdd = spriteSet[spriteListBox.SelectedIndex].Clone();
-            if (currentFrame.Sprites == null)
-                currentFrame.Sprites = new List<Sprite>();
-            currentFrame.Sprites.Add(spriteToAdd);
-            frameSprites.ResetBindings();
+
+            var mod = new AddSprite(frameSprites, frameSpriteListBox, currentFrame, spriteToAdd);
+            ModHelper.DoModificationWithSelectionTracking(mod, animationBox, frameListBox, frameSpriteListBox);
+            undoHistory.Add(mod);
         }
 
         private void addEmptyFrameButton_Click(object sender, EventArgs e)
diff --git a/AnimationEditor/Modifications/AddFrame.cs b/AnimationEditor/Modifications/AddFrame.cs
index e676bf8..d7a33d3 100644
--- a/AnimationEditor/Modifications/AddFrame.cs
+++ b/AnimationEditor/Modifications/AddFrame.cs
@@ -7,6 +7,7 @@ using System.ComponentModel;
 using QURO;
 using QURO.Animation;
 using System.Windows.Forms;
+using Microsoft.Xna.Framework;
 
 namespace AnimationEditor.Modifications
 {
@@ -36,7 +37,7 @@ namespace AnimationEditor.Modifications
             if (frameToAdd.Name != "empty" &&
                 frames.Count == 1 &&
                 frames[0].Sprites.Count == 1 &&
-                frames[0].Sprites[0].Name == "empty")
+                frames[0].Sprites[0].Bounds == Rectangle.Empty)
             {
                 frames.Clear();
             }
diff --git a/AnimationEditor/Modifications/AddSprite.cs b/AnimationEditor/Modifications/AddSprite.cs
new file mode 100644
index 0000000..2583d51
--- /dev/null
+++ b/AnimationEditor/Modifications/AddSprite.cs
@@ -0,0 +1,75 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.ComponentModel;
+using QURO;
+using QURO.Animation;
+using System.Windows.Forms;
+using Microsoft.Xna.Framework;
+
+namespace AnimationEditor.Modifications
+{
+    class AddSprite : IModification
+    {
+        private SelectionState preChangeSelection;
+        private SelectionState postChangeSelection;
+
+        private BindingList<Sprite> sprites;
+        private Frame currentFrame;
+        private ListBox spriteBox;
+        private Sprite spriteToAdd;
+
+        public AddSprite(BindingList<Sprite> spriteList, ListBox sprBox, Frame currFrame, Sprite sprite = null)
+        {
+            sprites = spriteList;
+            spriteBox = sprBox;
+            currentFrame = currFrame;
+            if (sprite != null)
+                spriteToAdd = sprite;
+            else spriteToAdd = new Sprite();
+        }
+
+        public void Do()
+        {
+            if (sprites.Count == 1 && sprites[0].Bounds == Rectangle.Empty)
+                sprites.Clear();
+
+            sprites.Add(spriteToAdd);
+            currentFrame.Sprites = sprites.ToList();
+            ModHelper.SetSingleSelection(spriteBox, sprites.Count - 1);
+        }
+
+        public void Undo()
+        {
+            sprites.RemoveAt(sprites.Count - 1);
+            if (sprites.Count == 0)
+                sprites.Add(new Sprite());
+            currentFrame.Sprites = sprites.ToList();
+        }
+
+        public SelectionState GetPreChangeSelection()
+        {
+            return preChangeSelection;
+        }
+        public void SetPreChangeSelection(SelectionState currentSelection)
+        {
+            preChangeSelection = currentSelection;
+        }
+        public SelectionState GetPostChangeSelection()
+        {
+            return postChangeSelection;
+        }
+        public void SetPostChangeSelection(SelectionState currentSelection)
+        {
+            postChangeSelection = currentSelection;
+        }
+
+
+        public override string ToString()
+        {
+            return "Add Sprite";
+        }
+    }
+}
diff --git a/AnimationEditor/Modifications/RemoveFrame.cs b/AnimationEditor/Modifications/RemoveFrame.cs
index db2266c..dfa84dd 100644
--- a/AnimationEditor/Modifications/RemoveFrame.cs
+++ b/AnimationEditor/Modifications/RemoveFrame.cs
@@ -7,6 +7,7 @@ using System.ComponentModel;
 using QURO;
 using QURO.Animation;
 using System.Windows.Forms;
+using Microsoft.Xna.Framework;
 
 namespace AnimationEditor.Modifications
 {
@@ -53,7 +54,7 @@ namespace AnimationEditor.Modifications
         {
             if(removedFrame != null)
             {
-                if(frames.Count == 1 && removeIndex == 0)
+                if (frames.Count == 1 && removeIndex == 0 && (frames[0].Sprites == null || frames[0].Sprites[0].Bounds == Rectangle.Empty))
                 {
                     frames.Clear();
                     frames.Add(removedFrame);