How do I filter my looker dashboard?
Adding dashboard filters. To get started, make sure the dashboard is in edit mode and that you have at least one query tile or Look-linked tile. Click Filters in the top toolbar, and then click Add Filter.
How do I filter data in looker?
Click the Custom Filter checkbox in the upper right: Enter a dimension or function. Looker will display a list of functions, operators, and field names to use in your expression. Click on a term in the drop-down to add it to your expression.