The video shows how to control field security in Odoo without any coding. First, you enable the Field Access Rule in the user settings to show the app, where a rule is created for the Customer field in Sales Order to manage various permissions. By simply checking options, the administrator can make the field Invisible to hide it from all views, Read-Only to prevent edits, or Required to make it mandatory, while also using relational restrictions like Disable Create, Disable Create & Edit, and Disable External Link to hide creation options and the external link icon. Furthermore, the Test Access button in the header opens a wizard where selecting a user and record ID explains exactly which rule is "Winning" based on its Priority and Tier, making it very easy to manage and check your security settings.

This video shows how to hide a field from everywhere in Odoo. First, if you tick Hide from Export, the field is removed from the export list, preventing users from downloading that specific data into Excel or CSV files. Using Hide in List / Tree and Hide in Kanban removes the field from those specific screen views to keep them clean or secure. Selecting Hide in Graph disables the field in visual charts so it cannot be used for analysis.A smart feature is that when you check Hide in Pivot, the system automatically checks the Group By and Custom Group boxes for you. This ensures the field is completely hidden from Pivot reports and the search bar, so users cannot organize or group data using that field.

The video shows how to hide a field from all search and filter options using the Field Access Rule app. A rule is created for the Employee model and the Department field. By checking the Hide from Search Bar and Hide from Filters boxes, the field disappears from the top search bar and the custom filter menu. Checking Hide from Search Panel removes the department list from the left-side panel. Finally, checking Hide from Group By takes away the option to group employees by their department. This ensures that the user cannot use the department field to search, filter, or organize their data at all.