diff --git a/Vts.Gui.Wpf.Test/ViewModel/Panels/ForwardSolverViewModelTests.cs b/Vts.Gui.Wpf.Test/ViewModel/Panels/ForwardSolverViewModelTests.cs
index bd6dbcb..9aff00c 100644
--- a/Vts.Gui.Wpf.Test/ViewModel/Panels/ForwardSolverViewModelTests.cs
+++ b/Vts.Gui.Wpf.Test/ViewModel/Panels/ForwardSolverViewModelTests.cs
@@ -15,7 +15,7 @@ public class ForwardSolverViewModelTests
         /// Verifies that ForwardSolverViewModel default constructor instantiates sub viewmodels
         /// </summary>
         [Test]
-        public void verify_default_constructor_sets_properties_correctly()
+        public void Verify_default_constructor_sets_properties_correctly()
         {
             // WindowViewModel needs to be instantiated for default constructor
             var windowViewModel = new WindowViewModel();
@@ -67,11 +67,100 @@ public void Verify_ExecuteForwardSolverCommand_returns_correct_values()
             Assert.AreEqual(s1, textOutputViewModel.Text);
         }
 
+        /// <summary>
+        /// Verifies that ForwardSolverViewModel returns correct multi-region tissue values
+        /// </summary>
+        [Test]
+        public void Verify_ExecuteForwardSolverCommand_multi_region_tissue_returns_correct_values()
+        {
+            // WindowViewModel needs to be instantiated for default constructor
+            var windowViewModel = new WindowViewModel();
+            var viewModel = windowViewModel.ForwardSolverVM;
+            viewModel.ForwardSolverTypeOptionVM.SelectedValue = ForwardSolverType.TwoLayerSDA;
+            viewModel.SolutionDomainTypeOptionVM.SelectedValue = SolutionDomainType.ROfFx;
+            viewModel.ForwardAnalysisTypeOptionVM.SelectedValue = ForwardAnalysisType.R;
+            viewModel.ExecuteForwardSolverCommand.Execute(null); 
+            var plotViewModel = windowViewModel.PlotVM;
+            const int i1 = 1;
+            const double d2 = 0.0100;
+            // s1 should be "Plot View: plot cleared due to independent axis variable change
+            // Forward Solver: Vts.Gui.Wpf.ViewModel.MultiRegionTissueViewModel"
+            var s1 = StringLookup.GetLocalizedString("Message_PlotViewCleared") + "\r" +
+                         StringLookup.GetLocalizedString("Label_ForwardSolver") +
+                         "Vts.Gui.Wpf.ViewModel.MultiRegionTissueViewModel\r";
+            // s2 should be "R(ρ) [Unitless] versus fx [1/mm]"
+            var s2 = StringLookup.GetLocalizedString("Label_ROfRho") + " [Unitless] " +
+                     StringLookup.GetLocalizedString("Label_Versus") + " fx [1/mm]";
+            // s3 should be "Model - 2 layer SDA\rμa1 = 0.0100\rμs'1=1.0000\rμa2 = 0.0100\r μs'2=1.0000"
+            var s3 = "\r" + StringLookup.GetLocalizedString("Label_Model2LayerSDA") + "\r" +
+                     StringLookup.GetLocalizedString("Label_MuA1") + "=" +
+                     d2.ToString("N4", CultureInfo.CurrentCulture) + "\r" +
+                     StringLookup.GetLocalizedString("Label_MuSPrime1") + "=" +
+                     i1.ToString("N4", CultureInfo.CurrentCulture) + "\r" +
+                     StringLookup.GetLocalizedString("Label_MuA2") + "=" +
+                     d2.ToString("N4", CultureInfo.CurrentCulture) + "\r" +
+                     StringLookup.GetLocalizedString("Label_MuSPrime2") + "=" +
+                     i1.ToString("N4", CultureInfo.CurrentCulture);
+            Assert.AreEqual(s3, plotViewModel.Labels[0]);
+            Assert.AreEqual(s2, plotViewModel.Title);
+            var textOutputViewModel = windowViewModel.TextOutputVM;
+            Assert.AreEqual(s1, textOutputViewModel.Text);
+        }
+
+        /// <summary>
+        /// Verifies that ForwardSolverViewModel returns correct complex derivative values
+        /// </summary>
+        [Test]
+        public void Verify_ExecuteForwardSolverCommand_complex_derivative_returns_correct_values()
+        {
+            // WindowViewModel needs to be instantiated for default constructor
+            var windowViewModel = new WindowViewModel();
+            var viewModel = windowViewModel.ForwardSolverVM;
+            viewModel.ForwardSolverTypeOptionVM.SelectedValue = ForwardSolverType.MonteCarlo;
+            viewModel.SolutionDomainTypeOptionVM.SelectedValue = SolutionDomainType.ROfFxAndFt;
+            viewModel.ForwardAnalysisTypeOptionVM.SelectedValue = ForwardAnalysisType.dRdMua;
+            viewModel.ExecuteForwardSolverCommand.Execute(null);
+            var plotViewModel = windowViewModel.PlotVM;
+            const double d1 = 0.01;
+            const int i1 = 1;
+            const double g = 0.8;
+            const double n = 1.4;
+            const double d2 = 0.0100;
+            const double d3 = 1.0000;
+            const double d4 = 0;
+            // s1 should be "Plot View: plot cleared due to independent axis variable change
+            // Forward Solver: μa = 0.01 μs'=1 g=0.8 n=1.4; Units = 1/mm"
+            var s1 = StringLookup.GetLocalizedString("Message_PlotViewCleared") + "\r" +
+                     StringLookup.GetLocalizedString("Label_ForwardSolver") +
+                     StringLookup.GetLocalizedString("Label_MuA") + "=" +
+                     d1.ToString(CultureInfo.CurrentCulture) + " " +
+                     StringLookup.GetLocalizedString("Label_MuSPrime") + "=" +
+                     i1.ToString(CultureInfo.CurrentCulture) + " g=" +
+                     g.ToString(CultureInfo.CurrentCulture) + " n=" +
+                     n.ToString(CultureInfo.CurrentCulture) + "; " +
+                     StringLookup.GetLocalizedString("Label_Units") + " = 1/mm\r";
+            // s2 should be "R(ρ) [GHz-1] versus fx [1/mm]"
+            var s2 = StringLookup.GetLocalizedString("Label_ROfRho") + " [GHz-1] " +
+                     StringLookup.GetLocalizedString("Label_Versus") + " fx [1/mm]";
+            // "ft" is not in Strings.resx
+            var s3 = "\r" + StringLookup.GetLocalizedString("Label_ModelScaledMC") + "\r" +
+                     StringLookup.GetLocalizedString("Label_MuA") + "=" +
+                     d2.ToString("N4", CultureInfo.CurrentCulture) + " \r" +
+                     StringLookup.GetLocalizedString("Label_MuSPrime") + "=" +
+                     d3.ToString("N4", CultureInfo.CurrentCulture) + " \rft = " +
+                     d4.ToString("N0", CultureInfo.CurrentCulture) + " " +
+                     StringLookup.GetLocalizedString("Measurement_GHz");
+            Assert.AreEqual(s3, plotViewModel.Labels[0]);
+            Assert.AreEqual(s2, plotViewModel.Title);
+            var textOutputViewModel = windowViewModel.TextOutputVM;
+            Assert.AreEqual(s1, textOutputViewModel.Text);
+        }
+
         /// <summary>
         /// Verifies that ForwardSolverViewModel disallows spectral panel inputs for TwoLayerSDA selection
         /// </summary>
         [Test]
-        public void verify_TwoLayerSDA_selection_does_not_display_usespectralpanelinputs_checkbox()
+        public void Verify_TwoLayerSDA_selection_does_not_display_usespectralpanelinputs_checkbox()
         {
             // WindowViewModel needs to be instantiated for default constructor
             var windowViewModel = new WindowViewModel();
@@ -83,12 +172,13 @@ public void verify_TwoLayerSDA_selection_does_not_display_usespectralpanelinputs
             Assert.IsFalse(viewModel.SolutionDomainTypeOptionVM.EnableMultiAxis);
             Assert.IsFalse(viewModel.SolutionDomainTypeOptionVM.EnableSpectralPanelInputs);
         }
+
         /// <summary>
         /// Verifies that ForwardSolverViewModel disallows time-dependent solution domain options
         /// for DistributedGaussianSourceSDA selection
         /// </summary>
         [Test]
-        public void verify_DistributedGaussianSourceSDA_selection_does_not_display_time_dependent_solution_domain_options()
+        public void Verify_DistributedGaussianSourceSDA_selection_does_not_display_time_dependent_solution_domain_options()
         {
             // WindowViewModel needs to be instantiated for default constructor
             var windowViewModel = new WindowViewModel();
@@ -101,5 +191,7 @@ public void verify_DistributedGaussianSourceSDA_selection_does_not_display_time_
             Assert.IsFalse(viewModel.SolutionDomainTypeOptionVM.IsROfFxAndTimeEnabled);
             Assert.IsFalse(viewModel.SolutionDomainTypeOptionVM.IsROfFxAndFtEnabled);
         }
+
+    
     }
 }
diff --git a/Vts.Gui.Wpf/ViewModel/Panels/PlotViewModel.cs b/Vts.Gui.Wpf/ViewModel/Panels/PlotViewModel.cs
index b7aa078..c7d6492 100644
--- a/Vts.Gui.Wpf/ViewModel/Panels/PlotViewModel.cs
+++ b/Vts.Gui.Wpf/ViewModel/Panels/PlotViewModel.cs
@@ -564,7 +564,7 @@ private void Plot_SetAxesLabels_Executed(object sender)
             if (sender is PlotAxesLabels labels)
             {
                 _clearPlot = false;
-                // set CurrentIndependtVariableAxis prior to setting Title because property
+                // set CurrentIndependentVariableAxis prior to setting Title because property
                 // might ClearPlot including Title
                 if (CurrentIndependentVariableAxis != labels.IndependentAxis.AxisType)
                 {
@@ -1015,11 +1015,6 @@ private void GenerateComplexDerivativePlot(DataPointCollection dataPointCollecti
                 {
                     case PlotToggleType.Phase:
                         y = -(dp.PhaseDerivative * (180 / Math.PI));
-                        //// force phase to be between 0 and 360
-                        //if (y < 0)
-                        //{
-                        //    y += 360;
-                        //}
                         switch (PlotNormalizationTypeOptionVm.SelectedValue)
                         {
                             case PlotNormalizationType.RelativeToCurve: