I. If you have set a filter and want to cancel the settings you should
1. Click on "Clear Filter" button on Filter panel toolbar
2. In case you don't have "Clear Filter" button on Filter panel toolbar you can activate it (right click on Filter panel toolbar -> Select 'Customize…' option -> Select 'Commands' tab -> Select necessary view -> Drag & drop "Clear Filter" button on Filter panel toolbar)
3. In case you don't have a toolbar on Filter panel you can activate it (View -> Toolbars)
B. If you have saved a filter and want to delete this preset filter from the drop down list, you should
1. Select this filter from the drop down list.
2. Click on "Delete Filter" button on Filter panel toolbar
3. In case you don't have "Delete Filter" button on Filter panel toolbar you can activate it (right click on Filter panel toolbar -> Select 'Customize…' option -> Select 'Commands' tab -> Select necessary view -> Drag & drop "Delete Filter" button on Filter panel toolbar)
4. In case you don't have a toolbar on Filter panel you can activate it (View -> Toolbars)