How to activate developer mode in Odoo
Multiple versions covered
This Tutorial is going to show you how to activate the developer mode in Odoo. It covers versions 9, 10, 11 and 12. You will use the feature every time you want to personalize your Odoo. I have created this tutorial so I won't need to explain it in the future tutorials.
Activate Developer Mode in Odoo 9 or older
Click on the user in the right corner, then "About" and "Activate Developer Mode".
If you can't do this you should activate "Technical Settings" in the Settings/Users.
Odoo 10, Odoo 11 & Odoo 12
Since Odoo 10 the Developer Mode is activated from Settings.
Activation link is located just below the "Share the Love" box.