diff --git a/README.md b/README.md
index bbf6135..8b00f7b 100644
--- a/README.md
+++ b/README.md
@@ -92,7 +92,7 @@ var simplemde = new SimpleMDE({
 
 #### Toolbar icons
 
-Below are the available toolbar icons, which can be reorganized however you like. "Name" is the name of the icon, referenced in the JS. "Action" is either a function or a URL to open. "Class" is the class given to the icon. "Tooltip" is the small tooltip that appears via the `title=""` attribute. The `Ctrl` and `Alt` in the title tags will be changed automatically to their Mac equivalents when needed. Additionally, you can add a separator between any icons by adding `"|"` to the toolbar array.
+Below are the built-in toolbar icons, which can be reorganized however you like. "Name" is the name of the icon, referenced in the JS. "Action" is either a function or a URL to open. "Class" is the class given to the icon. "Tooltip" is the small tooltip that appears via the `title=""` attribute. The `Ctrl` and `Alt` in the title tags will be changed automatically to their Mac equivalents when needed. Additionally, you can add a separator between any icons by adding `"|"` to the toolbar array.
 
 Name | Action | Class | Tooltip
 :--- | :----- | :---- | :------