diff --git a/README.Rmd b/README.Rmd
index abbf271..b6faea5 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -58,8 +58,10 @@ the normal distribution can be shown with:
 visualize.norm(1.96)
 # Change the location of the tail
 visualize.norm(1.96, section = "upper")
-# Shift the mean and create a bounded range.
+# Create a bounded range.
 visualize.norm(c(-1.96, 1.96), section = "bounded")
+# Highlight both tails
+visualize.norm(c(-1.96, 1.96), section = "tails")
 ```
 
 The parameters of the distribution can also be modified. Take for example the
diff --git a/README.md b/README.md
index 335cf79..e98b565 100644
--- a/README.md
+++ b/README.md
@@ -60,12 +60,19 @@ visualize.norm(1.96, section = "upper")
 <img src="man/figures/README-visualize-normal-2.png" width="50%" />
 
 ``` r
-# Shift the mean and create a bounded range.
+# Create a bounded range.
 visualize.norm(c(-1.96, 1.96), section = "bounded")
 ```
 
 <img src="man/figures/README-visualize-normal-3.png" width="50%" />
 
+``` r
+# Highlight both tails
+visualize.norm(c(-1.96, 1.96), section = "tails")
+```
+
+<img src="man/figures/README-visualize-normal-4.png" width="50%" />
+
 The parameters of the distribution can also be modified. Take for
 example the Binomial distribution.
 
diff --git a/man/figures/README-visualize-normal-4.png b/man/figures/README-visualize-normal-4.png
new file mode 100644
index 0000000..980200d
Binary files /dev/null and b/man/figures/README-visualize-normal-4.png differ