diff --git a/invesalius/gui/dicom_preview_panel.py b/invesalius/gui/dicom_preview_panel.py
index 2be5254..b727b91 100644
--- a/invesalius/gui/dicom_preview_panel.py
+++ b/invesalius/gui/dicom_preview_panel.py
@@ -908,7 +908,6 @@ class SingleImagePreview(wx.Panel):
                 filename = win32api.GetShortPathName(filename).encode(const.FS_ENCODE)
 
             np_image = imagedata_utils.read_dcm_slice_as_np2(filename)
-            print(">>> spacing", dicom.image.spacing)
             vtk_image = converters.to_vtk(np_image, dicom.image.spacing, 0, 'AXIAL')
 
             # ADJUST CONTRAST
@@ -933,6 +932,8 @@ class SingleImagePreview(wx.Panel):
             self.actor = vtk.vtkImageActor()
             self.renderer.AddActor(self.actor)
 
+        self.canvas.modified = True
+
         # PLOT IMAGE INTO VIEWER
         self.actor.SetInputData(flip.GetOutput())
         self.renderer.ResetCamera()
--
libgit2 0.21.2