diff --git a/invesalius/gui/dicom_preview_panel.py b/invesalius/gui/dicom_preview_panel.py
index 18daae4..f63172b 100644
--- a/invesalius/gui/dicom_preview_panel.py
+++ b/invesalius/gui/dicom_preview_panel.py
@@ -789,8 +789,8 @@ class SingleImagePreview(wx.Panel):
         in_sizer.Add(checkbox, 0)
 
         sizer = wx.BoxSizer(wx.VERTICAL)
-        sizer.Add(self.panel, 20, wx.GROW|wx.EXPAND)
-        sizer.Add(in_sizer, 1, wx.GROW|wx.EXPAND)
+        sizer.Add(self.panel, 1, wx.GROW|wx.EXPAND)
+        sizer.Add(in_sizer, 0, wx.GROW|wx.EXPAND)
         sizer.Fit(self)
 
         self.SetSizer(sizer)
diff --git a/invesalius/gui/import_panel.py b/invesalius/gui/import_panel.py
index 62ff4e6..cb5dc76 100644
--- a/invesalius/gui/import_panel.py
+++ b/invesalius/gui/import_panel.py
@@ -104,7 +104,7 @@ class InnerPanel(wx.Panel):
 
         inner_sizer = wx.BoxSizer(wx.HORIZONTAL)
         inner_sizer.Add(btnsizer, 0, wx.LEFT|wx.TOP, 5)
-        inner_sizer.Add(self.combo_interval, 0, wx.LEFT|wx.RIGHT|wx.TOP, 5)
+        inner_sizer.Add(self.combo_interval, 0, wx.ALIGN_CENTER_VERTICAL|wx.LEFT|wx.RIGHT|wx.TOP, 5)
         panel.SetSizer(inner_sizer)
         inner_sizer.Fit(panel)
 
--
libgit2 0.21.2