Update README.md

README.md

@@ -2,14 +2,15 @@
 GM Code Exporter exports code from `.gml` files in a GameMaker project.
 
 It is very quickly put together without much polish - but it does the job!
- 
+
+
 ## Usage
 
 You need to have [Node.js](https://nodejs.org/) installed to use this tool from the CLI.
 
 If you are using it for the first time, you need to install the dependecies using:
 ```shell
-npm install;
+npm install
 ```
 
 Run the following command:
@@ -23,6 +24,43 @@ node index.js --obj --scr --yyp <yyp_path_here>
 | --obj | Get code from the objects |
 | --scr | Get code from the scripts |
 
-&nbsp;
-
 An output text file will be generated in the `./out/` directory.
+
+
+## Customization
+
+You can customize the header and footer of how each file is printed in the output. The classes can be edited from `./src/Types.js`.
+
+<table>
+  <thead>
+    <tr>
+      <th>Class</th>
+      <th>Method</th>
+      <th>Description</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td rowspan=2>Object</td>
+      <td>get_header</td>
+      <td>Header of code from GM objects</td>
+    </tr>
+    <tr>
+      <td>get_footer</td>
+      <td>Footer of code from GM objects</td>
+    </tr>
+  </tbody>
+  <tbody>
+    <tr>
+      <td rowspan=2>Script</td>
+      <td>get_header</td>
+      <td>Header of code from GM scripts</td>
+    </tr>
+    <tr>
+      <td>get_footer</td>
+      <td>Footer of code from GM scripts</td>
+    </tr>
+  </tbody>
+</table>
+
+All methods have the same argument, `fname`, which indicates the gml file name the code is being read from.