def Timestep_Box(self):

        #---------------------------------------------
        #  Create sizer box for the process timestep
        #---------------------------------------------
        time_info = self.proc_info.timestep
        unit_str  = "[" + time_info.units + "]"
        ## unit_str  = "[" + time_info.units + " / timestep]"
        L1    = wx.StaticText(self.panel, -1, time_info.label + ":")
        text  = wx.TextCtrl(self.panel,   -1, time_info.value)
        L2    = wx.StaticText(self.panel, -1, unit_str)
        #-------------------------------------------------------        
        box   = wx.BoxSizer(wx.HORIZONTAL)
        box.Add((3*self.hgap, 3*self.hgap), 1)
        box.Add(L1)
        box.Add((self.hgap, self.hgap), 1)
        box.Add(text)
        box.Add((self.hgap, self.hgap), 1)
        box.Add(L2)

        # self.SetSizer(box)  ## (Bad to do this here.)
        return box