diff --git a/AudioAnalysis.sln b/AudioAnalysis.sln
index 8a480992d..0acaebcb1 100644
--- a/AudioAnalysis.sln
+++ b/AudioAnalysis.sln
@@ -1,6 +1,6 @@
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.29721.120
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31410.414
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{A050BD53-DEE0-40F3-BEAB-1F7474533C40}"
 	ProjectSection(SolutionItems) = preProject
@@ -68,6 +68,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "build", "build", "{B3123A8D
 		build\update_audio_utils.ps1 = build\update_audio_utils.ps1
 	EndProjectSection
 EndProject
+Project("{D954291E-2A0B-460D-934E-DC6B0785DB48}") = "ConfigFiles", "src\AnalysisConfigFiles\ConfigFiles.shproj", "{17DF521A-7CC1-48D9-BE0D-32F6FA13BB8A}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
diff --git a/src/AnalysisConfigFiles/ConfigFiles.projitems b/src/AnalysisConfigFiles/ConfigFiles.projitems
new file mode 100644
index 000000000..1beb91bbe
--- /dev/null
+++ b/src/AnalysisConfigFiles/ConfigFiles.projitems
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <MSBuildAllProjects Condition="'$(MSBuildVersion)' == '' Or '$(MSBuildVersion)' &lt; '16.0'">$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
+    <HasSharedItems>true</HasSharedItems>
+    <SharedGUID>17df521a-7cc1-48d9-be0d-32f6fa13bb8a</SharedGUID>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration">
+    <Import_RootNamespace>ConfigFiles</Import_RootNamespace>
+  </PropertyGroup>
+  <ItemGroup>
+    <None Include="**/*.*" />
+    <None Remove="*.projitems*" />
+  </ItemGroup>
+</Project>
diff --git a/src/AnalysisConfigFiles/ConfigFiles.shproj b/src/AnalysisConfigFiles/ConfigFiles.shproj
new file mode 100644
index 000000000..c0c70ad24
--- /dev/null
+++ b/src/AnalysisConfigFiles/ConfigFiles.shproj
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>17df521a-7cc1-48d9-be0d-32f6fa13bb8a</ProjectGuid>
+    <MinimumVisualStudioVersion>14.0</MinimumVisualStudioVersion>
+  </PropertyGroup>
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.Common.Default.props" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.Common.props" />
+  <PropertyGroup />
+  <Import Project="ConfigFiles.projitems" Label="Shared" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.CSharp.targets" />
+</Project>
diff --git a/src/AnalysisConfigFiles/Ecosounds.AED.yml b/src/AnalysisConfigFiles/Ecosounds.AED.yml
index c776673b5..f54e610f6 100644
--- a/src/AnalysisConfigFiles/Ecosounds.AED.yml
+++ b/src/AnalysisConfigFiles/Ecosounds.AED.yml
@@ -31,4 +31,4 @@ SaveIntermediateCsvFiles: false
 SaveSonogramImages: Never
 
 IndexPropertiesConfig: ".\\IndexPropertiesConfig.yml"
-...
\ No newline at end of file
+...
diff --git a/src/AnalysisConfigFiles/SpectrogramFalseColourConfig.HighRes.yml b/src/AnalysisConfigFiles/SpectrogramFalseColourConfig.HighRes.yml
index 7f5d1c8ad..6fdbcc05e 100644
--- a/src/AnalysisConfigFiles/SpectrogramFalseColourConfig.HighRes.yml
+++ b/src/AnalysisConfigFiles/SpectrogramFalseColourConfig.HighRes.yml
@@ -25,5 +25,12 @@ XAxisTicIntervalSeconds: 3600
 # Only "Linear", "Linear125Octaves7Tones28Nyquist32000" work at present 
 FreqScale: "Linear"
 YAxisTicInterval: 1000
+
+# "Chrome" is the term used to refer to all the decoration around the data.
+# If `true`, titles, axes, and grids will be drawn on the FCS.
+# If `false`, only the raw image will be output.
+# Raw images are useful if you want to use FCS in another application.
+ImageChrome: true
+
 # IndexPropertiesConfig: './IndexPropertiesConfigHiRes.yml'
 ...
\ No newline at end of file
diff --git a/src/AnalysisConfigFiles/SpectrogramFalseColourConfig.yml b/src/AnalysisConfigFiles/SpectrogramFalseColourConfig.yml
index 729d8ac9b..d22db1500 100644
--- a/src/AnalysisConfigFiles/SpectrogramFalseColourConfig.yml
+++ b/src/AnalysisConfigFiles/SpectrogramFalseColourConfig.yml
@@ -32,4 +32,10 @@ XAxisTicIntervalSeconds: 3600
 #FreqScale: "Linear125Octaves7Tones28Nyquist32000"
 FreqScale: "Linear"
 YAxisTicInterval: 1000
+
+# "Chrome" is the term used to refer to all the decoration around the data.
+# If `true`, titles, axes, and grids will be drawn on the FCS.
+# If `false`, only the raw image will be output.
+# Raw images are useful if you want to use FCS in another application.
+ImageChrome: true
 ...
\ No newline at end of file
diff --git a/src/AnalysisConfigFiles/SpectrogramZoomingConfig.yml b/src/AnalysisConfigFiles/SpectrogramZoomingConfig.yml
index 2fb85a26a..2a91131c7 100644
--- a/src/AnalysisConfigFiles/SpectrogramZoomingConfig.yml
+++ b/src/AnalysisConfigFiles/SpectrogramZoomingConfig.yml
@@ -28,5 +28,6 @@ LdSpectrogramConfig:
     XAxisTicIntervalSeconds: 3600
     # Hertz
     YAxisTicInterval: 1000
+    ImageChrome: false
 IndexPropertiesConfig: './IndexPropertiesConfig.Zooming.yml'
 ...
\ No newline at end of file
diff --git a/src/AnalysisConfigFiles/Towsey.Acoustic.yml b/src/AnalysisConfigFiles/Towsey.Acoustic.yml
index 42d9730bf..db6a986dd 100644
--- a/src/AnalysisConfigFiles/Towsey.Acoustic.yml
+++ b/src/AnalysisConfigFiles/Towsey.Acoustic.yml
@@ -137,5 +137,11 @@ LdSpectrogramConfig:
     # Future options will be: Linear62Octaves31Nyquist11025, Linear125Octaves30Nyquist11025, Octaves24Nyquist32000
     FreqScale: "Linear"
     YAxisTicInterval: 1000
+
+    # "Chrome" is the term used to refer to all the decoration around the data.
+    # If `true`, titles, axes, and grids will be drawn on the FCS.
+    # If `false`, only the raw image will be output.
+    # Raw images are useful if you want to use FCS in another application.
+    ImageChrome: true
 ...
 
diff --git a/src/AnalysisConfigFiles/Towsey.ContentDescription.yml b/src/AnalysisConfigFiles/Towsey.ContentDescription.yml
index 03924b430..5b5a29202 100644
--- a/src/AnalysisConfigFiles/Towsey.ContentDescription.yml
+++ b/src/AnalysisConfigFiles/Towsey.ContentDescription.yml
@@ -58,5 +58,6 @@ LdSpectrogramConfig:
     XAxisTicIntervalSeconds: 3600
     FreqScale: "Linear"
     YAxisTicInterval: 1000
+    ImageChrome: true
 ...
 
diff --git a/src/AnalysisPrograms/AcousticIndices.cs b/src/AnalysisPrograms/AcousticIndices.cs
index e3963248b..47c7b72fa 100644
--- a/src/AnalysisPrograms/AcousticIndices.cs
+++ b/src/AnalysisPrograms/AcousticIndices.cs
@@ -76,7 +76,7 @@ public class AcousticIndicesConfig : IndexCalculateConfig
             /// <summary>
             /// Gets or sets the LDFC spectrogram configuration.
             /// </summary>
-            public LdSpectrogramConfig LdSpectrogramConfig { get; protected set; } = new LdSpectrogramConfig();
+            public LdSpectrogramConfig LdSpectrogramConfig { get; set; } = new LdSpectrogramConfig();
 
             public bool TileOutput { get; private set; } = false;
 
@@ -318,6 +318,11 @@ public void SummariseResults(AnalysisSettings settings, FileSegment inputFileSeg
             {
                 FileInfo indicesPropertiesConfig = acousticIndicesConfig.IndexPropertiesConfig.ToFileInfo();
 
+                // if needed override iamge chrome
+                if (tileOutput) {
+                    ldSpectrogramConfig.ImageChrome = false;
+                }
+
                 // Actually draw false color / long duration spectrograms
                 Tuple<Image<Rgb24>, string>[] images =
                     LDSpectrogramRGB.DrawSpectrogramsFromSpectralIndices(
@@ -329,8 +334,7 @@ public void SummariseResults(AnalysisSettings settings, FileSegment inputFileSeg
                         basename: basename,
                         analysisType: this.Identifier,
                         indexSpectrograms: dictionaryOfSpectra,
-                        indexStatistics: indexDistributions,
-                        imageChrome: (!tileOutput).ToImageChrome());
+                        indexStatistics: indexDistributions);
 
                 if (tileOutput)
                 {
diff --git a/src/AnalysisPrograms/ConcatenateIndexFiles.cs b/src/AnalysisPrograms/ConcatenateIndexFiles.cs
index 6160aa519..be88257e4 100644
--- a/src/AnalysisPrograms/ConcatenateIndexFiles.cs
+++ b/src/AnalysisPrograms/ConcatenateIndexFiles.cs
@@ -425,8 +425,7 @@ public static void Execute(Arguments arguments)
                             indexDistributions,
                             siteDescription,
                             sunriseDataFile: null,
-                            segmentErrors: gapsAndJoins,
-                            imageChrome: ImageChrome.With);
+                            segmentErrors: gapsAndJoins);
                 }
 
                 WriteSpectralIndexFiles(resultsDir, outputFileStem, AcousticIndices.TowseyAcoustic, dictionaryOfSpectralIndices1);
@@ -549,8 +548,7 @@ public static void Execute(Arguments arguments)
                         indexDistributions,
                         siteDescription,
                         sunriseDataFile: null,
-                        segmentErrors: indexErrors,
-                        imageChrome: ImageChrome.With);
+                        segmentErrors: indexErrors);
 
                     if (!arguments.EventDataDirectories.IsNullOrEmpty())
                     {
diff --git a/src/AnalysisPrograms/DrawLongDurationSpectrograms.cs b/src/AnalysisPrograms/DrawLongDurationSpectrograms.cs
index d68a684b9..a2f585e1d 100644
--- a/src/AnalysisPrograms/DrawLongDurationSpectrograms.cs
+++ b/src/AnalysisPrograms/DrawLongDurationSpectrograms.cs
@@ -176,8 +176,7 @@ public static void Execute(Arguments arguments)
                 analysisType: AcousticIndices.TowseyAcoustic,
                 indexSpectrograms: null,
                 indexStatistics: indexDistributionsData,
-                segmentErrors: indexErrors,
-                imageChrome: false.ToImageChrome());
+                segmentErrors: indexErrors);
 
             Log.Success("Draw Long Duration Spectrograms complete!");
         }
diff --git a/src/AudioAnalysisTools/LongDurationSpectrograms/LDSpectrogramConfig.cs b/src/AudioAnalysisTools/LongDurationSpectrograms/LDSpectrogramConfig.cs
index 62a99a41f..191a627d7 100644
--- a/src/AudioAnalysisTools/LongDurationSpectrograms/LDSpectrogramConfig.cs
+++ b/src/AudioAnalysisTools/LongDurationSpectrograms/LDSpectrogramConfig.cs
@@ -64,6 +64,13 @@ public LdSpectrogramConfig()
         /// </summary>
         public double? BlueEnhanceParameter { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether or not to render chrome around the FCS.
+        /// Chrome is all the decoration around the data; axes, grids, titles, etc.
+        /// </summary>
+        /// <value>If <c>true</c> will render image chrome.</value>
+        public bool ImageChrome { get; set; } = true;
+
         /// <summary>
         /// Gets or sets the default XAxisTicInterval.
         /// The default assumes one minute spectra i.e. 60 per hour
diff --git a/src/AudioAnalysisTools/LongDurationSpectrograms/LDSpectrogramRGB.cs b/src/AudioAnalysisTools/LongDurationSpectrograms/LDSpectrogramRGB.cs
index 5a55e682e..3c6bc2b2c 100644
--- a/src/AudioAnalysisTools/LongDurationSpectrograms/LDSpectrogramRGB.cs
+++ b/src/AudioAnalysisTools/LongDurationSpectrograms/LDSpectrogramRGB.cs
@@ -75,6 +75,8 @@ public class LDSpectrogramRGB
         // public static readonly string DefaultColorMap1 = "ACI, ENT, EVN";
         // public static readonly string DefaultColorMap2 = "BGN, PMN, SPT";
 
+        public const int TrackHeight = 18;
+
         // the defaults
         public static readonly string DefaultColorMap1 = SpectrogramConstants.RGBMap_ACI_ENT_EVN;
         public static readonly string DefaultColorMap2 = SpectrogramConstants.RGBMap_BGN_PMN_SPT;
@@ -524,7 +526,7 @@ public void LoadSpectrogramDictionary(Dictionary<string, double[,]> dictionary)
         /// <summary>
         /// draws only those spectrograms in the passed array of keys.
         /// </summary>
-        public void DrawGreyScaleSpectrograms(DirectoryInfo opdir, string opFileName, string[] keys)
+        public void DrawGreyScaleSpectrograms(DirectoryInfo opdir, string opFileName, string[] keys, ImageChrome chrome = ImageChrome.With)
         {
             foreach (string key in keys)
             {
@@ -558,15 +560,22 @@ public void DrawGreyScaleSpectrograms(DirectoryInfo opdir, string opFileName, st
                     continue;
                 }
 
-                var bmp = this.DrawGreyscaleSpectrogramOfIndex(key);
-
-                var header = Drawing.NewImage(bmp.Width, 20, Color.LightGray);
-                header.Mutate(g =>
+                var bmp = this.DrawGreyscaleSpectrogramOfIndex(key, chrome);
+                Image<Rgb24> indexImage;
+                if (chrome is ImageChrome.With)
                 {
-                    g.DrawTextSafe(key, Drawing.Tahoma9, Color.Black, new PointF(4, 4));
-                });
+                    var header = Drawing.NewImage(bmp.Width, SpectrogramConstants.HEIGHT_OF_TITLE_BAR, Color.LightGray);
+                    header.Mutate(g =>
+                    {
+                        g.DrawTextSafe(key, Drawing.Tahoma9, Color.Black, new PointF(4, 4));
+                    });
 
-                var indexImage = ImageTools.CombineImagesVertically(header, bmp);
+                    indexImage = ImageTools.CombineImagesVertically(header, bmp);
+                }
+                else
+                {
+                    indexImage = bmp;
+                }
 
                 // save the image - the directory for the path must exist
                 var path = FilenameHelpers.AnalysisResultPath(opdir, opFileName, key, "png");
@@ -576,7 +585,7 @@ public void DrawGreyScaleSpectrograms(DirectoryInfo opdir, string opFileName, st
 
         /// <summary>
         /// Assume calling method has done all the reality checks.</summary>
-        public Image<Rgb24> DrawGreyscaleSpectrogramOfIndex(string key)
+        public Image<Rgb24> DrawGreyscaleSpectrogramOfIndex(string key, ImageChrome chrome = ImageChrome.With)
         {
             var matrix = this.GetNormalisedSpectrogramMatrix(key);
             if (matrix == null)
@@ -585,13 +594,18 @@ public Image<Rgb24> DrawGreyscaleSpectrogramOfIndex(string key)
             }
 
             var bmp = ImageTools.DrawReversedMatrixWithoutNormalisation(matrix);
+
+            if (chrome is ImageChrome.Without)
+            {
+                return bmp;
+            }
+
             var xAxisPixelDuration = this.IndexCalculationDuration;
             var fullDuration = TimeSpan.FromTicks(xAxisPixelDuration.Ticks * bmp.Width);
 
-            SpectrogramTools.DrawGridLinesOnImage((Image<Rgb24>)bmp, this.StartOffset, fullDuration, xAxisPixelDuration, this.FreqScale);
-            const int trackHeight = 20;
-            var timeBmp = ImageTrack.DrawTimeTrack(fullDuration, this.RecordingStartDate, bmp.Width, trackHeight);
-            var returnImage = ImageTools.CombineImagesVertically(bmp, timeBmp);
+            SpectrogramTools.DrawGridLinesOnImage(bmp, this.StartOffset, fullDuration, xAxisPixelDuration, this.FreqScale);
+            var timeBmp = ImageTrack.DrawTimeTrack(fullDuration, this.RecordingStartDate, bmp.Width, TrackHeight);
+            var returnImage = ImageTools.CombineImagesVertically(timeBmp, bmp, timeBmp);
             return returnImage;
         }
 
@@ -723,14 +737,13 @@ public bool ContainsMatrixForKey(string key)
         public Image<Rgb24> DrawDoubleSpectrogram(Image bmp1, Image bmp2, string colorMode)
         {
             var fullDuration = TimeSpan.FromSeconds(bmp2.Width); // assume one minute per pixel.
-            const int trackHeight = 20;
-            int imageHt = bmp2.Height + bmp1.Height + trackHeight + trackHeight + trackHeight;
+            int imageHt = bmp2.Height + bmp1.Height + TrackHeight + TrackHeight + TrackHeight;
             var title =
                 $"FALSE COLOUR and BACKGROUND NOISE SPECTROGRAMS      (scale: hours x kHz)      (colour: R-G-B = {this.ColorMap})         {Meta.OrganizationTag}  ";
-            var titleBmp = ImageTrack.DrawTitleTrack(bmp2.Width, trackHeight, title);
+            var titleBmp = ImageTrack.DrawTitleTrack(bmp2.Width, TrackHeight, title);
             var timeScale = SpectrogramConstants.X_AXIS_TIC_INTERVAL;
             var offsetMinute = TimeSpan.Zero;
-            var timeBmp = ImageTrack.DrawTimeTrack(fullDuration, offsetMinute, timeScale, bmp2.Width, trackHeight, "hours");
+            var timeBmp = ImageTrack.DrawTimeTrack(fullDuration, offsetMinute, timeScale, bmp2.Width, TrackHeight, "hours");
 
             var compositeBmp = new Image<Rgb24>(bmp2.Width, imageHt); //get canvas for entire image
             compositeBmp.Mutate(gr =>
@@ -749,7 +762,7 @@ public Image<Rgb24> DrawDoubleSpectrogram(Image bmp1, Image bmp2, string colorMo
 
                 // draw a colour spectrum of basic colours
                 int maxScaleLength = bmp2.Width / 3;
-                var scale = DrawColourScale(maxScaleLength, trackHeight - 2);
+                var scale = DrawColourScale(maxScaleLength, TrackHeight - 2);
                 int xLocation = bmp2.Width * 2 / 3;
                 gr.DrawImage(scale, new Point(xLocation, 1), 1f); //dra
             });
@@ -791,14 +804,13 @@ public static Image<Rgb24> FrameLDSpectrogram(Image<Rgb24> bmp1, Image<Rgb24> ti
             var xAxisPixelDuration = cs.IndexCalculationDuration;
             var fullDuration = TimeSpan.FromTicks(xAxisPixelDuration.Ticks * bmp1.Width);
 
-            int trackHeight = 18;
-            Image<Rgb24> timeBmp1 = ImageTrack.DrawTimeRelativeTrack(fullDuration, bmp1.Width, trackHeight);
+            Image<Rgb24> timeBmp1 = ImageTrack.DrawTimeRelativeTrack(fullDuration, bmp1.Width, TrackHeight);
             Image<Rgb24> timeBmp2 = (Image<Rgb24>)timeBmp1.Clone();
             DateTimeOffset? dateTimeOffset = cs.RecordingStartDate;
             if (dateTimeOffset.HasValue)
             {
                 // draw extra time scale with absolute start time. AND THEN DO SOMETHING WITH IT.
-                timeBmp2 = ImageTrack.DrawTimeTrack(fullDuration, cs.RecordingStartDate, bmp1.Width, trackHeight);
+                timeBmp2 = ImageTrack.DrawTimeTrack(fullDuration, cs.RecordingStartDate, bmp1.Width, TrackHeight);
             }
 
             if (cs.FreqScale == null)
@@ -857,9 +869,8 @@ public static Image DrawGreyscaleSpectrogramOfIndex(string key, double[,] matrix
             var freqScale = new FrequencyScale(11025, 512, 1000);
 
             SpectrogramTools.DrawGridLinesOnImage((Image<Rgb24>)bmp, TimeSpan.Zero, fullDuration, xAxisPixelDuration, freqScale);
-            const int trackHeight = 20;
             var recordingStartDate = default(DateTimeOffset);
-            var timeBmp = ImageTrack.DrawTimeTrack(fullDuration, recordingStartDate, bmp.Width, trackHeight);
+            var timeBmp = ImageTrack.DrawTimeTrack(fullDuration, recordingStartDate, bmp.Width, TrackHeight);
             var array = new Image<Rgb24>[2];
             array[0] = bmp;
             array[1] = timeBmp;
@@ -1102,7 +1113,6 @@ public static Image DrawColourScale(int maxScaleLength, int ht)
         /// <param name="siteDescription">Optionally specify details about the site where the audio was recorded.</param>
         /// <param name="sunriseDataFile">This is only available for locations near Brisbane, Austalia.</param>
         /// <param name="segmentErrors">Note that these segment errors were derived from previous analysis of the summary indices.</param>
-        /// <param name="imageChrome">If true, this method generates and returns separate chromeless images used for tiling website images.</param>
         public static Tuple<Image<Rgb24>, string>[] DrawSpectrogramsFromSpectralIndices(
             DirectoryInfo inputDirectory,
             DirectoryInfo outputDirectory,
@@ -1116,11 +1126,13 @@ public static Tuple<Image<Rgb24>, string>[] DrawSpectrogramsFromSpectralIndices(
             Dictionary<string, IndexDistributions.SpectralStats> indexStatistics = null,
             SiteDescription siteDescription = null,
             FileInfo sunriseDataFile = null,
-            List<GapsAndJoins> segmentErrors = null,
-            ImageChrome imageChrome = ImageChrome.With)
+            List<GapsAndJoins> segmentErrors = null)
         {
             var config = ldSpectrogramConfig;
 
+            ImageChrome imageChrome = ldSpectrogramConfig.ImageChrome.ToImageChrome();
+            Log.Debug($"FCS image will be rendered {imageChrome} chrome");
+
             // These parameters manipulate the color map and appearance of the false-color spectrogram
             string colorMap1 = config.ColorMap1 ?? DefaultColorMap1;   // assigns indices to RGB
             string colorMap2 = config.ColorMap2 ?? DefaultColorMap2;   // assigns indices to RGB
@@ -1150,10 +1162,7 @@ public static Tuple<Image<Rgb24>, string>[] DrawSpectrogramsFromSpectralIndices(
             {
                 DateTimeOffset dto = (DateTimeOffset)indexGenerationData.RecordingStartDate;
                 cs1.RecordingStartDate = dto;
-                if (dto != null)
-                {
-                    cs1.StartOffset = dto.TimeOfDay + cs1.StartOffset;
-                }
+                cs1.StartOffset = dto.TimeOfDay + cs1.StartOffset;
             }
 
             // Get and set the dictionary of index properties
@@ -1205,7 +1214,7 @@ public static Tuple<Image<Rgb24>, string>[] DrawSpectrogramsFromSpectralIndices(
 
             // draw gray scale spectrogram for each index.
             var keys = SpectralIndexValues.Keys;
-            cs1.DrawGreyScaleSpectrograms(outputDirectory, fileStem, keys);
+            cs1.DrawGreyScaleSpectrograms(outputDirectory, fileStem, keys, imageChrome);
 
             // create and save first false-color spectrogram image
             var image1NoChrome = cs1.DrawFalseColorSpectrogramChromeless(cs1.ColorMode, colorMap1, blueEnhanceParameter);
@@ -1216,9 +1225,11 @@ public static Tuple<Image<Rgb24>, string>[] DrawSpectrogramsFromSpectralIndices(
             }
             else
             {
-                image1 = SpectrogramFraming(cs1, (Image<Rgb24>)image1NoChrome.Clone());
-                var outputPath1 = FilenameHelpers.AnalysisResultPath(outputDirectory, cs1.FileName, colorMap1, "png");
-                image1.Save(outputPath1);
+               image1 = imageChrome is ImageChrome.With ? SpectrogramFraming(cs1, image1NoChrome.Clone()) : image1NoChrome;
+
+               var outputPath1 = FilenameHelpers.AnalysisResultPath(outputDirectory, cs1.FileName, colorMap1, "png");
+
+               image1.Save(outputPath1);
             }
 
             // create and save second false-color spectrogram image
@@ -1231,7 +1242,8 @@ public static Tuple<Image<Rgb24>, string>[] DrawSpectrogramsFromSpectralIndices(
             else
             {
                 cs1.ColorMap = colorMap2;
-                image2 = SpectrogramFraming(cs1, (Image<Rgb24>)image2NoChrome.Clone());
+                image2 = imageChrome is ImageChrome.With ? image2 = SpectrogramFraming(cs1, image2NoChrome.Clone()) : image2NoChrome;
+
                 var outputPath2 = FilenameHelpers.AnalysisResultPath(outputDirectory, cs1.FileName, colorMap2, "png");
                 image2.Save(outputPath2);
             }
@@ -1292,10 +1304,7 @@ public static Tuple<Image<Rgb24>, string>[] DrawSpectrogramsFromSpectralIndices(
                 ribbon.Save(FilenameHelpers.AnalysisResultPath(outputDirectory, fileStem, colorMap2 + LdSpectrogramRibbons.SpectralRibbonTag, "png"));
             }
 
-            // only return images if chromeless
-            return imageChrome == ImageChrome.Without
-                       ? new[] { Tuple.Create(image1NoChrome, colorMap1), Tuple.Create(image2NoChrome, colorMap2) }
-                       : null;
+            return new[] { Tuple.Create(image1NoChrome, colorMap1), Tuple.Create(image2NoChrome, colorMap2) };
         }
 
         /// <summary>
diff --git a/src/AudioAnalysisTools/LongDurationSpectrograms/LDSpectrogramStitching.cs b/src/AudioAnalysisTools/LongDurationSpectrograms/LDSpectrogramStitching.cs
index 0aaf9d6a0..ca27daf9a 100644
--- a/src/AudioAnalysisTools/LongDurationSpectrograms/LDSpectrogramStitching.cs
+++ b/src/AudioAnalysisTools/LongDurationSpectrograms/LDSpectrogramStitching.cs
@@ -113,8 +113,7 @@ public static void DrawSpectralIndexFiles(
                     indexDistributions,
                     siteDescription,
                     sunriseDataFile,
-                    segmentErrors,
-                    ImageChrome.With);
+                    segmentErrors);
             }
         }
 
diff --git a/tests/Acoustics.Test/AudioAnalysisTools/LongDurationSpectrograms/LDSpectrogramRGBTests.cs b/tests/Acoustics.Test/AudioAnalysisTools/LongDurationSpectrograms/LDSpectrogramRGBTests.cs
index c2bec37c5..06b0c0a8e 100644
--- a/tests/Acoustics.Test/AudioAnalysisTools/LongDurationSpectrograms/LDSpectrogramRGBTests.cs
+++ b/tests/Acoustics.Test/AudioAnalysisTools/LongDurationSpectrograms/LDSpectrogramRGBTests.cs
@@ -22,8 +22,7 @@ namespace Acoustics.Test.AudioAnalysisTools.LongDurationSpectrograms
     [TestClass]
     public class LDSpectrogramRGBTests : OutputDirectoryTest
     {
-        [TestMethod]
-        public void TestChromelessImage()
+        private void GenerateAndTestFakeFCS(LdSpectrogramConfig config, int expectedHeight)
         {
             var indexPropertiesFile = ConfigFile.Default<IndexPropertiesCollection>();
             var indexProperties = ConfigFile.Deserialize<IndexPropertiesCollection>(indexPropertiesFile);
@@ -42,7 +41,7 @@ public void TestChromelessImage()
             var images = LDSpectrogramRGB.DrawSpectrogramsFromSpectralIndices(
                 inputDirectory: null,
                 outputDirectory: this.TestOutputDirectory,
-                ldSpectrogramConfig: new LdSpectrogramConfig(),
+                ldSpectrogramConfig: config,
                 indexPropertiesConfigPath: indexPropertiesFile,
                 indexGenerationData: new IndexGenerationData()
                 {
@@ -61,16 +60,49 @@ public void TestChromelessImage()
                     .Select((x) => new SummaryIndexValues(60.0.Seconds(), indexProperties))
                     .Cast<SummaryIndexBase>()
                     .ToArray(),
-                indexStatistics: indexStatistics,
-                imageChrome: ImageChrome.Without);
+                indexStatistics: indexStatistics);
+
+            Assert.IsNotNull(images);
 
+            // chromeless images returned
             foreach (var (image, key) in images)
             {
                 Assert.That.ImageIsSize(60, 256, image);
-                Assert.That.ImageRegionIsColor(Rectangle.FromLTRB(0, 0, 60, 256), Color.Black, (Image<Rgb24>)image);
+                Assert.That.ImageRegionIsColor(Rectangle.FromLTRB(0, 0, 60, 256), Color.Black, image);
+            }
+
+            // check images on disk are chromed/chromeless
+            var imagesToCheck = images.Select(item => item.Item2).Concat(keys);
+            foreach (var key in imagesToCheck)
+            {
+                var image = FilenameHelpers.AnalysisResultPath(this.TestOutputDirectory, "RGB_TEST", key, "png");
+                this.TestContext.WriteLine($"Testing {key}, found {image}");
+                var info = Image.Identify(image);
+
+                Assert.AreEqual(60, info.Bounds().Width);
+                Assert.AreEqual(expectedHeight, info.Bounds().Height, $"Image {image} was not expected height {expectedHeight} but was  {info.Height}");
             }
         }
 
+        [TestMethod]
+        public void TestChromedImage()
+        {
+            var config = new LdSpectrogramConfig();
+            Assert.IsTrue(config.ImageChrome, "Should render chrome by default");
+
+            var expectedHeight = 256 + SpectrogramConstants.HEIGHT_OF_TITLE_BAR + (LDSpectrogramRGB.TrackHeight * 2); // track height, bottom and top
+
+            this.GenerateAndTestFakeFCS(config, expectedHeight);
+        }
+
+        [TestMethod]
+        public void TestChromelessImage()
+        {
+            var config = new LdSpectrogramConfig() { ImageChrome = false };
+
+            this.GenerateAndTestFakeFCS(config, 256);
+        }
+
         [TestMethod]
         public void TestDrawRgbColorMatrix()
         {