Query filters (Channel Filter or Filters in Fields) help to restrict the values available for tagging in a tagbox e.g. show only products for EMEA; or the Content Items displayed in a specific Channel e.g. only approved product marketing content. Those filters do not require user input, they have a fixed return set based on specific criteria e.g. show only Arrangements, show only current employees, show only players from Real Madrid. Query filters are available for channels, fields (Tagbox, Relationship), via API (searching content, creation of channels, tagbox fields, relationship fields, or lists). Query Filters are code, there is no editor.