When Odoo is first installed, you are presented with a default template that will appear on many of the standard reports. Even if you don't plan to make a lot of major changes to the standard reports in Odoo, it is very likely that you will want to modify the headers and footers and other parts of your report template to be more unique to your company.
To begin editing Odoo headers and footers, it is best if you log in as an Odoo administrator. Furthermore, to access all of the report settings and configurations, you will need to go into Developer Mode, as described in Chapter 13, Customizing Odoo for Your Business. This is accomplished by going to the Settings menu and then clicking on the Activate Developer Mode link on the right-hand side of the form.
Once you have Developer Mode turned on, navigate to the Settings menu and click General Settings...