diff --git a/gui.py b/gui.py
index 85ea833..4cc9adb 100644
--- a/gui.py
+++ b/gui.py
@@ -58,6 +58,10 @@ class FMFaceGeneratorGUI:
         self.image_queue = queue.Queue()
         self.current_profile = None
 
+        # Preview tracking variables
+        self.generated_images = []  # List of generated image UIDs
+        self.current_image_index = -1  # Current image being displayed
+
         # Set up the GUI
         self.setup_gui()
 
@@ -617,6 +621,9 @@ class FMFaceGeneratorGUI:
         ttk.Button(nav_frame, text="Next", command=self.show_next_image).pack(side=tk.LEFT, padx=5)
         ttk.Button(nav_frame, text="Refresh", command=self.refresh_preview).pack(side=tk.RIGHT, padx=5)
 
+        # Scan for existing images on startup
+        self.root.after(1000, self.scan_existing_images)  # Delay to allow config to load
+
     def browse_model_dir(self):
         """Browse for model directory"""
         directory = filedialog.askdirectory(title="Select Model Directory")
@@ -713,6 +720,9 @@ class FMFaceGeneratorGUI:
                     self.rtf_file_var.set('')
                     self.output_dir_var.set('./NewGens/')
                     self.log_message("No profile selected, using defaults")
+
+                # Scan for existing images after loading config
+                self.root.after(500, self.scan_existing_images)
             else:
                 self.log_message("No configuration file found, using defaults")
 
@@ -919,6 +929,15 @@ class FMFaceGeneratorGUI:
         try:
             image_path = f"{self.output_dir_var.get()}/{uid}.png"
             if os.path.exists(image_path):
+                # Add to generated images list if not already present
+                if uid not in self.generated_images:
+                    self.generated_images.append(uid)
+                    self.update_total_count()
+
+                # Find the index of current image
+                if uid in self.generated_images:
+                    self.current_image_index = self.generated_images.index(uid)
+
                 # Load and resize image
                 image = Image.open(image_path)
                 image.thumbnail((300, 300), Image.Resampling.LANCZOS)
@@ -937,16 +956,73 @@ class FMFaceGeneratorGUI:
 
     def show_previous_image(self):
         """Show previous image"""
-        self.log_message("Previous image functionality not implemented yet")
+        if not self.generated_images:
+            self.log_message("No images available to navigate")
+            return
+
+        if self.current_image_index <= 0:
+            self.log_message("Already at first image")
+            return
+
+        self.current_image_index -= 1
+        uid = self.generated_images[self.current_image_index]
+        self.show_image(uid)
 
     def show_next_image(self):
         """Show next image"""
-        self.log_message("Next image functionality not implemented yet")
+        if not self.generated_images:
+            self.log_message("No images available to navigate")
+            return
+
+        if self.current_image_index >= len(self.generated_images) - 1:
+            self.log_message("Already at last image")
+            return
+
+        self.current_image_index += 1
+        uid = self.generated_images[self.current_image_index]
+        self.show_image(uid)
+
+    def update_total_count(self):
+        """Update the total generated count display"""
+        count = len(self.generated_images)
+        self.total_generated_var.set(str(count))
+        self.log_message(f"Total generated images: {count}")
+
+    def scan_existing_images(self):
+        """Scan the output directory for existing images"""
+        try:
+            output_dir = self.output_dir_var.get()
+            if not output_dir or not os.path.exists(output_dir):
+                return
+
+            # Find all PNG files in the output directory
+            existing_images = []
+            for file in os.listdir(output_dir):
+                if file.endswith('.png') and file[:-4].isdigit():
+                    uid = file[:-4]  # Remove .png extension
+                    existing_images.append(uid)
+
+            # Sort by UID (numerically)
+            existing_images.sort(key=int)
+
+            # Update our tracking list
+            self.generated_images = existing_images
+            self.update_total_count()
+
+            if existing_images:
+                self.log_message(f"Found {len(existing_images)} existing images")
+            else:
+                self.log_message("No existing images found")
+
+        except Exception as e:
+            self.log_message(f"Error scanning existing images: {str(e)}")
 
     def refresh_preview(self):
         """Refresh the preview"""
         self.log_message("Refreshing preview...")
-        # This would scan the output directory and show available images
+        self.scan_existing_images()
+        if self.generated_images:
+            self.show_image(self.generated_images[0])  # Show first image
 
 def main():
     """Main function"""