diff --git a/R/plot_heatmap.R b/R/plot_heatmap.R
index 43e0cca..aba8372 100644
--- a/R/plot_heatmap.R
+++ b/R/plot_heatmap.R
@@ -13,20 +13,14 @@ plot_heatmap <- function(bear1d_list)
   ## Create rectangle to plot parameter values on the heatmap plot
   ###############################################################
 
-  # rect_data <- data.frame( ### Surany Parameters
-  #   xmin = 1, xmax = 4,
-  #   ymin = 120, ymax = 600
-  # )
+  ### Surany Parameters
+  # rect_data <- data.frame(xmin = 1, xmax = 4, ymin = 120, ymax = 600)
 
-  # rect_data <- data.frame( ### Surany Parameters
-  #  xmin = 1, xmax = 1.9,
-  #  ymin = 500, ymax = 2000
-  # )
+  ### Surany Parameters
+  # rect_data <- data.frame(xmin = 1, xmax = 1.9, ymin = 500, ymax = 2000)
 
-  rect_data <- data.frame( ### Vienna / Tahi (10 PFAS) Parameters
-    xmin = 1, xmax = 2.9,
-    ymin = 500, ymax = 2000
-  )
+  ### Vienna / Tahi (10 PFAS) Parameters
+  rect_data <- data.frame(xmin = 1, xmax = 2.9, ymin = 500, ymax = 2000)
 
   ################################################################
 
@@ -37,11 +31,12 @@ plot_heatmap <- function(bear1d_list)
   # Create a heatmap using ggplot2
   heatmap_plot <- data %>%
     ggplot2::ggplot(ggplot2::aes(
-      y = .data$hl,
       x = .data$log_koc,
+      y = .data$hl
+    )) +
+    ggplot2::geom_tile(ggplot2::aes(
       fill = .data$Cx
     )) +
-    ggplot2::geom_tile() +
     ggplot2::geom_rect(
       data = rect_data,
       ggplot2::aes(
@@ -103,7 +98,7 @@ plot_heatmap <- function(bear1d_list)
     ) +
     ggplot2::theme_bw() +
     ggplot2::theme(
-      axis.text.x = text_element,  # Adjust the size as needed
+      axis.text.x = text_element,
       axis.text.y = text_element,
       axis.title.x = text_element,
       axis.title.y = text_element
diff --git a/vignettes/Tutorial.Rmd b/vignettes/case-studies.Rmd
similarity index 97%
rename from vignettes/Tutorial.Rmd
rename to vignettes/case-studies.Rmd
index cc282b8..6f2d4b5 100644
--- a/vignettes/Tutorial.Rmd
+++ b/vignettes/case-studies.Rmd
@@ -1,10 +1,10 @@
 ---
 editor_options: 
   chunk_output_type: console
-title: "Tutorial"
+title: "Case Studies"
 output: rmarkdown::html_vignette
 vignette: >
-  %\VignetteIndexEntry{Tutorial}
+  %\VignetteIndexEntry{Case Studies}
   %\VignetteEngine{knitr::rmarkdown}
   %\VignetteEncoding{UTF-8}
 ---
@@ -17,8 +17,6 @@ knitr::opts_chunk$set(
 )
 ```
 
-## Case Studies 
-
 ### Budapest Tahi
 
 ```{r Budapest_Tahi}