Odoo provides default filters for all of the list views. Applying a filter will limit the records that Odoo is displaying. You can apply one or more filters depending on your needs. The available filters will vary depending on the data that you are viewing.

For example, the Products view will have a completely different set of filters and group options than the Customers view:

While each search box will have different default filters and Group By options, the functionality will be the same. In Odoo 11, you can access all the search features by clicking the small magnifying glass with the + sign in it to the right of the search box:

When you click this, Odoo will expand the search area to show all the search features. Let's return to the customer list and click the small triangle to bring up the advanced search options:

In Odoo 11, the advanced search tools have been consolidated into Filters, Group By, and Favorites. Let's first explore the data using Filters to limit the records that are displayed:

In the example dropdown in the preceding screenshot, you can see the check mark next to the filter that has been applied—Can be Sold. The tags for the currently selected filter are also displayed inside the search box. Clicking on a filter applies the filter immediately and refreshes the results list.

Naturally, the list of available filters will change depending on which set of records you are viewing. You can add multiple filters and Odoo will return the records that match all of the filters which you have applied. Clicking on a filter that is already highlighted will remove that filter from the search.