diff --git a/docs/awesome_table_in_pdf.Rmd b/docs/awesome_table_in_pdf.Rmd
index c20f16f..d05733e 100644
--- a/docs/awesome_table_in_pdf.Rmd
+++ b/docs/awesome_table_in_pdf.Rmd
@@ -253,12 +253,14 @@
 ```
 
 # Add header column to the left
-An alternative way of grouping rows is being added to `kableExtra` 0.3.0. Unlike `group_rows`, the new function `add_header_left` adopts a similar syntax with `add_header_above`. It allows users to add multiple layers of row groups, which is a limitation of `group_rows`. A limitation of `add_header_left` is that, you can only use it in `booktabs` tables. There is no future plan to extend support to LaTeX table without booktabs because when a new layer of heading columns being added, every `cline` in normal table needs to be changed. Other limitations include incompatible with `group_rows` and a little in-stable `striped` row coloring behavior. If you don't have special need for multiple layers of heading columns or special love to this format, I will recommend you stick with `group_rows`. 
+An alternative way of grouping rows is being added to `kableExtra` 0.3.0. Unlike `group_rows`, the new function `add_header_left` adopts a similar syntax with `add_header_above`. It allows users to add multiple layers of row groups, which is a limitation of `group_rows`. One limitation of `add_header_left` is that, you can only use it in `booktabs` tables. There is no future plan to extend support to LaTeX table without booktabs because it is techinically very difficult. Other limitations include incompatible with `group_rows` and a little in-stable `striped` row coloring behavior. If you don't have special need for multiple layers of heading columns or special love to this format, I will recommend you stick with `group_rows`. 
 
 ```{r}
 mtcars[1:10, 1:6] %>%
   kable("latex", booktabs= T) %>%
   add_header_above(c(" ", "Data 1" = 3, "Data 2" = 3)) %>%
-  add_header_left(c("Group A" = 3, "Group B" = 7), "Group") %>%
-  add_header_left(c("Team X" = 4, "Team Y" = 2, "Team Z" = 4), "Team") 
+  add_header_left(c("Group A" = 3, "Group B" = 2, "Group C" = 4, "Group D" = 1), "Group") %>%
+  add_header_left(c("Team X" = 5, "Team Y" = 5), "Team", full_midline = T) %>%
+  add_header_left(c("League Alpha" = 10), "League") %>%
+  column_spec(1, bold = T)
 ```
diff --git a/docs/awesome_table_in_pdf.pdf b/docs/awesome_table_in_pdf.pdf
index 0f92239..edebef7 100644
--- a/docs/awesome_table_in_pdf.pdf
+++ b/docs/awesome_table_in_pdf.pdf
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