Thx for your answer , forgot to tell you that i was on Windows installation. 

@Ermin  : i don't want use slides

But maybe my question wasn't enough explicit.

What i would like to do is this kind of website : https://www.odoo.com/documentation/9.0/index.html

This part is ok, i can re-create it without any problem. It's just tiles containing image with a link to another page.

But when i enter in this page, for example the first one "Theme Tutorial" or Buildind a website" ... it's the structure of the body that i can't recreate.

https://www.odoo.com/documentation/9.0/howtos/themes.html

https://www.odoo.com/documentation/9.0/howtos/website.html

Both of these pages have the same body as : 

- a left menu with anchors

- center : contraining text, code, print, ....

And that's what i would like to have on my own website.

i don't talk about the contains of the site, but the look of it.

The link you have mentioned explains how to build a custom website. Please read it carefully and if you still have specific questions, come back and ask specific questions.

All the documents are based on Github, so it is easy to find the \source here which means if you like, you can copy and modify that into what you like.