diff --git a/src/msspec/iodata.py b/src/msspec/iodata.py
index 3308cb5..998485b 100644
--- a/src/msspec/iodata.py
+++ b/src/msspec/iodata.py
@@ -80,6 +80,7 @@ import numpy as np
 import wx.grid
 from lxml import etree
 from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas
+#from matplotlib.backends.backend_wxagg import FigureCanvasWx as FigureCanvas
 from matplotlib.backends.backend_agg import FigureCanvasAgg
 from matplotlib.backends.backend_wxagg import NavigationToolbar2WxAgg
 from matplotlib.figure import Figure
@@ -1084,7 +1085,8 @@ class _DataWindow(wx.Frame):
         for dset in self.data:
             nb = wx.Notebook(self, -1)
             self.notebooks[dset.title] = nb
-            self.GetSizer().Add(nb, 1, wx.ALL|wx.EXPAND)
+            #self.GetSizer().Add(nb, 1, wx.ALL|wx.EXPAND)
+            self.GetSizer().Add(nb, proportion=1, flag=wx.ALL|wx.EXPAND)
             for view in dset.views():
                 self.create_page(nb, view)
 
@@ -1273,10 +1275,12 @@ class _DataWindow(wx.Frame):
         toolbar = NavigationToolbar2WxAgg(canvas)
         toolbar.Realize()
 
-        sizer.Add(toolbar, 0, wx.ALL|wx.EXPAND)
+        #sizer.Add(toolbar, 0, wx.ALL|wx.EXPAND)
+        sizer.Add(toolbar, proportion=0, flag=wx.ALL|wx.EXPAND)
         toolbar.update()
 
-        sizer.Add(canvas, 5, wx.ALL|wx.EXPAND)
+        #sizer.Add(canvas, 5, wx.ALL|wx.EXPAND)
+        sizer.Add(canvas, proportion=1, flag=wx.ALL|wx.EXPAND)
 
         p.SetSizer(sizer)
         p.Fit()
@@ -1287,6 +1291,7 @@ class _DataWindow(wx.Frame):
         figure.canvas.mpl_connect('pick_event', self.on_mpl_pick)
 
         nb.AddPage(p, view.title)
+        canvas.draw()
 
 
     def OLDcreate_page(self, nb, view):