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diff --git a/pdf/fig_S02_synthesis.pdf b/pdf/fig_S02_synthesis.pdf
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diff --git a/supplementary_fig02.md b/supplementary_fig02.md
index 6279be5..d5f6938 100644
--- a/supplementary_fig02.md
+++ b/supplementary_fig02.md
@@ -515,3 +515,24 @@ for(i in seq_along(msSamples) ){
 ```
 
 ![](supplementary_fig02_files/figure-commonmark/unnamed-chunk-22-1.png)
+
+Plot a figure:
+
+``` r
+# Set up a 2x1 layout for subplots
+par(mfrow = c(2, 1), mar = c(3, 4, 1, 1))
+
+# Plot the first sample data
+ms.plot(msdata[msdata$sample == 'RXN488',], col = RColorBrewer::brewer.pal(6, 'PuOr')[2])
+# Add label for the first sample
+text(1700, 90, mylabels[2], col = RColorBrewer::brewer.pal(6, 'PuOr')[2])
+
+# Reset the layout for the second subplot
+par(mar = c(4, 4, 1, 1))
+# Plot the second sample data
+ms.plot(msdata[msdata$sample == 'RXN594',], col = RColorBrewer::brewer.pal(6, 'PuOr')[6])
+# Add label for the second sample
+text(1700, 90, mylabels[1], col = RColorBrewer::brewer.pal(6, 'PuOr')[6])
+```
+
+![](supplementary_fig02_files/figure-commonmark/unnamed-chunk-23-1.png)
diff --git a/supplementary_fig02.qmd b/supplementary_fig02.qmd
index b73eddd..707b1ad 100644
--- a/supplementary_fig02.qmd
+++ b/supplementary_fig02.qmd
@@ -305,3 +305,21 @@ for(i in seq_along(msSamples) ){
   ms.plot(msdata[msdata$sample==msSamples[i],], main=msSamples[i], col=i)
 }
 ``` 
+
+Plot a figure:
+```{r}
+# Set up a 2x1 layout for subplots
+par(mfrow = c(2, 1), mar = c(3, 4, 1, 1))
+
+# Plot the first sample data
+ms.plot(msdata[msdata$sample == 'RXN488',], col = RColorBrewer::brewer.pal(6, 'PuOr')[2])
+# Add label for the first sample
+text(1700, 90, mylabels[2], col = RColorBrewer::brewer.pal(6, 'PuOr')[2])
+
+# Reset the layout for the second subplot
+par(mar = c(4, 4, 1, 1))
+# Plot the second sample data
+ms.plot(msdata[msdata$sample == 'RXN594',], col = RColorBrewer::brewer.pal(6, 'PuOr')[6])
+# Add label for the second sample
+text(1700, 90, mylabels[1], col = RColorBrewer::brewer.pal(6, 'PuOr')[6])
+```
diff --git a/supplementary_fig02_files/figure-commonmark/unnamed-chunk-23-1.png b/supplementary_fig02_files/figure-commonmark/unnamed-chunk-23-1.png
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