1. First create the inner query (the one you'll need inside other queries)
  2. Optional: In many cases you'll want to use parameters on the inner query
  3. Add a Query-Run Part to your Query
  4. Pick the query you want to run in the part-configuration pick query to run
  5. If you are using Params, set them from the Query Run part
    1. Open the configuration
    2. Set the values to use like Author=42 (one per line) or
      use tokens like Author=[QueryString:Author] or
      use values from an In-Stream like Author=[In:Default:AuthorId] 
  6. Run and test
  7. Adjust as needed