When viewing a report, you can apply filters to narrow down the report data.
When multiple filters are applied, they are linked together via an implicit AND relationship. In other words, only rows that satisfy all of the filters will match.
To add a filter, press the Add filter... (1) button. The field selector (2) opens and you can select the field you want to filter by.
Depending on the selected field's type (text, number, date, boolean), different filtering options are presented.
You can remove any filter by pressing the gray cross directly on the right side of the filter.