diff --git a/README.md b/README.md
index ee1b717..557b123 100644
--- a/README.md
+++ b/README.md
@@ -40,10 +40,14 @@ In the `root` are files related with the organization and the structure of the *
 └── thesisStructure.tex
 ```
 
+# The `thesisStructure` file
+The main file in the project is the `thesisStructure.tex` file. The file is mainly divided on four parts: 1)configuration, 2)Front Matter, 3) Main contents, and 4) References and 5)Back Matter.
 
+From here the document class, for the Protocol, is defined with `\documentclass[<options>]{itmthesis}`, and this file determine the way the PDF file is generated by the options. The options defined are:
 
-# The `thesisStructure` file
-The main file in the project is the `thesisStructure.tex` file. 
+- `drafting`: The options prints the date of compilation at the end of each page. Suitable opton to know that the latest version is on review or writing process.
+- `listing`: The option loads the `listings` package and configures the compilation to generates a gray scale listings outputs.
+- `spanish`: The option enables the babel package to print-out the sectional units on spanish language; otherwise, english will be used.
 
 ```Tex
 % Engineering, master and phd degree