Filters provide a powerful way to narrow down and organize your data according to your specific requirements. NocoDB supports nested filters, allowing you to select multiple columns and conditions for filtering. You can choose between `and` or `or` mode of operation to combine filters, and filtering also supports Lookup, Formula, and Nested Data.
### Adding or Editing Filters
To add or edit a filter, simply click the `Filter` button in the toolbar and select either `Add filter` or `Add filter group`.
By default, NULL filters (`is null` &`is not null`) and EMPTY filters (`is empty` &`is not empty`) are hidden. If you wish to filter out either of these explicitly, you can enable `Show NULL and EMPTY Filter` in [Project settings](/bases/actions-on-base#base-settings).