diff --git a/sashimi/state.py b/sashimi/state.py
index 2af6118..fd72b3c 100644
--- a/sashimi/state.py
+++ b/sashimi/state.py
@@ -5,6 +5,7 @@
 from lightparam.param_qt import ParametrizedQt
 from lightparam import Param, ParameterTree
 from sashimi.hardware.light_source import light_source_class_dict
+from typing import Union
 
 # from sashimi.hardware import light_source_class_dict
 from sashimi.processes.scanning import ScannerProcess
@@ -224,16 +225,20 @@ def calculate_calibration(self):
 
 
 def get_voxel_size(
-    scanning_settings: ZRecordingSettings,
+    scanning_settings: Union[ZRecordingSettings, SinglePlaneSettings],
     camera_settings: CameraSettings,
 ):
-    scan_length = (
-        scanning_settings.piezo_scan_range[1] - scanning_settings.piezo_scan_range[0]
-    )
 
     binning = int(camera_settings.binning)
 
-    inter_plane = scan_length / scanning_settings.n_planes
+    if isinstance(scanning_settings, SinglePlaneSettings):
+        inter_plane = 1
+    else:
+        scan_length = (
+            scanning_settings.piezo_scan_range[1]
+            - scanning_settings.piezo_scan_range[0]
+        )
+        inter_plane = scan_length / scanning_settings.n_planes
 
     return (
         inter_plane,
@@ -244,13 +249,16 @@ def get_voxel_size(
 
 def convert_save_params(
     save_settings: SaveSettings,
-    scanning_settings: ZRecordingSettings,
+    scanning_settings: Union[ZRecordingSettings, SinglePlaneSettings],
     camera_settings: CameraSettings,
     trigger_settings: TriggerSettings,
 ):
-    n_planes = scanning_settings.n_planes - (
-        scanning_settings.n_skip_start + scanning_settings.n_skip_end
-    )
+    if isinstance(scanning_settings, SinglePlaneSettings):
+        n_planes = 0
+    else:
+        n_planes = scanning_settings.n_planes - (
+            scanning_settings.n_skip_start + scanning_settings.n_skip_end
+        )
 
     return SavingParameters(
         output_dir=Path(save_settings.save_dir),
@@ -472,12 +480,21 @@ def n_planes(self):
 
     @property
     def save_params(self):
-        return convert_save_params(
-            self.save_settings,
-            self.volume_setting,
-            self.camera_settings,
-            self.trigger_settings,
-        )
+        if self.global_state == GlobalState.PLANAR_PREVIEW:
+            save_p = convert_save_params(
+                self.save_settings,
+                self.single_plane_settings,
+                self.camera_settings,
+                self.trigger_settings,
+            )
+        else:
+            save_p = convert_save_params(
+                self.save_settings,
+                self.volume_setting,
+                self.camera_settings,
+                self.trigger_settings,
+            )
+        return save_p
 
     @property
     def scan_params(self):