Updated documentation

docs/usage/headers-and-footers.md

@@ -2,52 +2,46 @@
 
 !> Headers and Footers requires an understanding of [Sections](usage/sections.md).
 
-## Example
+Every Section has a sections which you can define its Headers and Footers:
-
-Creating Headers and footers is simple. Access the `Header` and `Footer` by doing so like this:
 
 ```ts
-doc.Header;
-doc.Footer;
-```
-
-You can call the same methods as you would with a `File`:
-
-```ts
-doc.Header.createParagraph("Header text");
-doc.Footer.createParagraph("Footer text");
-```
-
-Even add images:
-
-```ts
-doc.Header.createImage([BUFFER_OF_YOUR_IMAGE]);
-doc.Footer.createImage([BUFFER_OF_YOUR_IMAGE]);
-```
-
-Refer to [`8-header-footer`](https://github.com/dolanmiu/docx/blob/master/demo/8-header-footer.ts) for more information.
-
-## Multiple Headers and Footers
-
-Also all the supported section properties are implemented according to: http://officeopenxml.com/WPsection.php
-
-### Example
-
-```ts
-    const header = this.document.createHeader();
-    const footer = this.document.createFooter();
-
-    // Add new section with another header and footer
 doc.addSection({
     headers: {
-        default: header
+        default: new Header({ // The standard default header
+            children: [],
+        }),
+        first: new Header({ // The first header
+            children: [],
+        }),
+        even: new Header({ // The header on every other page
+            children: [],
+        }),
     },
     footers: {
-        default: footer
+        default: new Footer({ // The standard default footer
+            children: [],
+        }),
+        first: new Footer({ // The first footer
+            children: [],
+        }),
+        even: new Footer({ // The footer on every other page
+            children: [],
+        }),
     },
-      pageNumberStart: 1,
+    children: [],
-      pageNumberFormatType: docx.PageNumberFormat.DECIMAL,
 });
 ```
 
+If you want more head
 
+## Example
+
+Example showing basic header and footer
+
+[Example](https://raw.githubusercontent.com/dolanmiu/docx/master/demo/8-header-footer.ts ":include")
+
+_Source: https://github.com/dolanmiu/docx/blob/master/demo/8-header-footer.ts_
+
+## Multiple Headers and Footers
+
+More headers and footers can be accomplished by creating more `Section`. New headers and footers can be set per `Section`