diff --git a/indi_allsky/flask/forms.py b/indi_allsky/flask/forms.py
index 3297948b6..2bf5a631a 100644
--- a/indi_allsky/flask/forms.py
+++ b/indi_allsky/flask/forms.py
@@ -3422,4 +3422,5 @@ class IndiAllskyImageProcessingForm(FlaskForm):
     IMAGE_ALIGN_POINTS               = IntegerField('Alignment points', validators=[DataRequired(), IMAGE_ALIGN_POINTS_validator])
     IMAGE_ALIGN_SOURCEMINAREA        = IntegerField('Minimum point area', validators=[DataRequired(), IMAGE_ALIGN_SOURCEMINAREA_validator])
     #IMAGE_STACK_SPLIT                = BooleanField('Stack split screen')
+    PROCESSING_SPLIT_SCREEN          = BooleanField('Split screen')
 
diff --git a/indi_allsky/flask/templates/imageprocessing.html b/indi_allsky/flask/templates/imageprocessing.html
index afc5a60c0..208e953e2 100644
--- a/indi_allsky/flask/templates/imageprocessing.html
+++ b/indi_allsky/flask/templates/imageprocessing.html
@@ -92,6 +92,23 @@
 
     <hr>
 
+    <!--
+    <div class="form-group row">
+        <div class="col-sm-2">
+            {{ form_image_processing.PROCESSING_SPLIT_SCREEN.label }}
+        </div>
+        <div class="col-sm-2">
+            <div class="form-switch">
+                {{ form_image_processing.PROCESSING_SPLIT_SCREEN(class='form-check-input') }}
+                <div id="PROCESSING_SPLIT_SCREEN-error" class="invalid-feedback text-danger" style="display: none;"></div>
+            </div>
+        </div>
+        <div class="col-sm-8"></div>
+    </div>
+
+    <hr>
+    -->
+
     <div class="form-group row">
         <div class="col-sm-2">
             {{ form_image_processing.DETECT_MASK.label(class='col-form-label') }}
@@ -596,6 +613,7 @@ <h5>These options are applied to the unprocessed image automatically</h5>
     'IMAGE_STRETCH__MODE1_ENABLE',
     'AUTO_WB',
     'IMAGE_STACK_ALIGN',
+    //'PROCESSING_SPLIT_SCREEN',
 ];
 
 var fields = {};
diff --git a/indi_allsky/flask/views.py b/indi_allsky/flask/views.py
index 0f339c5a1..1ab93b24c 100644
--- a/indi_allsky/flask/views.py
+++ b/indi_allsky/flask/views.py
@@ -3554,6 +3554,7 @@ def get_context(self):
             'IMAGE_ALIGN_DETECTSIGMA'        : self.indi_allsky_config.get('IMAGE_ALIGN_DETECTSIGMA', 5),
             'IMAGE_ALIGN_POINTS'             : self.indi_allsky_config.get('IMAGE_ALIGN_POINTS', 50),
             'IMAGE_ALIGN_SOURCEMINAREA'      : self.indi_allsky_config.get('IMAGE_ALIGN_SOURCEMINAREA', 10),
+            'PROCESSING_SPLIT_SCREEN'        : False,
         }
 
         # SQM_ROI
@@ -3658,6 +3659,7 @@ def dispatch_request(self):
         p_config['IMAGE_ALIGN_POINTS']                   = int(request.json['IMAGE_ALIGN_POINTS'])
         p_config['IMAGE_ALIGN_SOURCEMINAREA']            = int(request.json['IMAGE_ALIGN_SOURCEMINAREA'])
         p_config['IMAGE_STACK_SPLIT']                    = False
+        p_config['PROCESSING_SPLIT_SCREEN']              = bool(request.json.get('PROCESSING_SPLIT_SCREEN', False))
 
 
         # SQM_ROI
diff --git a/indi_allsky/processing.py b/indi_allsky/processing.py
index 7ee1607a5..e73ca7481 100644
--- a/indi_allsky/processing.py
+++ b/indi_allsky/processing.py
@@ -881,7 +881,7 @@ def stack(self):
 
 
         if self.config.get('IMAGE_STACK_SPLIT'):
-            self.image = self._splitscreen(i_ref['hdulist'][0].data, self.image)
+            self.image = self.splitscreen(i_ref['hdulist'][0].data, self.image)
 
 
         stack_elapsed_s = time.time() - stack_start
@@ -1466,14 +1466,14 @@ def scale_image(self):
         self.image = cv2.resize(self.image, (new_width, new_height), interpolation=cv2.INTER_AREA)
 
 
-    def _splitscreen(self, original_data, stacked_data):
+    def splitscreen(self, original_data, new_data):
         # if flip horizontal is set, this data will swap sides later
         if self.config.get('IMAGE_FLIP_H'):
-            left_data = stacked_data
+            left_data = new_data
             right_data = original_data
         else:
             left_data = original_data
-            right_data = stacked_data
+            right_data = new_data
 
 
         image_height, image_width = left_data.shape[:2]
@@ -2362,7 +2362,7 @@ def stretch(self):
 
 
         if is_stretched and self.config.get('IMAGE_STRETCH', {}).get('SPLIT'):
-            self.image = self._splitscreen(self.image, stretched_image)
+            self.image = self.splitscreen(self.image, stretched_image)
             return
 
 
diff --git a/testing/align_rolling.py b/testing/align_rolling.py
index 17834f017..f160743bf 100755
--- a/testing/align_rolling.py
+++ b/testing/align_rolling.py
@@ -169,7 +169,7 @@ def main(self, inputfiles):
 
 
             if self.split_screen:
-                stacked_img = self._splitscreen(reference_hdulist[0].data, stacked_img)
+                stacked_img = self.splitscreen(reference_hdulist[0].data, stacked_img)
 
 
             stacked_bitdepth = self._detectBitDepth(stacked_img)
@@ -260,7 +260,7 @@ def _crop(self, image):
         ]
 
 
-    def _splitscreen(self, left_data, right_data):
+    def splitscreen(self, left_data, right_data):
         image_height, image_width = left_data.shape[:2]