You can edit an existing filter by selecting a specific filter from the list of 'Saved Filters' option under 'Filters' dropdown and edit the filter criteria as required.

Once you edit the filter, it searches for the latest filter criteria and gives latest data in results. You can save this filter criteria by clicking on save filter option.

Use the filter options available by clicking on funnel icon. Once a filter is applied, click on 'Save' option to save filter with specified filter criteria. You can open a saved filter, edit the filters accessible to you (by clicking on 'Edit' option) as well as delete any unwanted filters (by clicking on 'Delete' option).