1. UI of login

1. enable developer mode : settings=> developer mode (at bottom)

2. select technical tab : settings=> technical tab => User interface => view

3. search 'layout' => select 'weblayout'

4. edit

2. Remove 'my online odoo account' link from avatar menu

1. open the file: \odoo\server\odoo\addons\web\static\src\webclient\user_menu\user_menu_items.js

2. remove the code

3. CSS of main layout

1. open the file : \odoo\server\odoo\addons\web_enterprise\static\src\legacy\scss\ui.scss

4. CSS of nav bar

1. open the file : \odoo\server\odoo\addons\web\static\src\legacy\scss\navbar.scss

2. variable file : \odoo\server\odoo\addons\web\static\src\legacy\scss\primary_variables.scss

5. Change browser title

E:\odoo\16\server\odoo\addons\web\static\src\webclient\webclient.js

change the coe

              this.title.setParts({ zopenerp: "Odoo" });