So now you are in design view. The top pane is the Diagram Pane which contains the table that you have previously selected. These are the tables that are used for the query.
In the bottom pane, fields are kept that you will actually use in the query. As well as filtering criteria that we specify.
Make a double tap from a table in the top pane to make it appear in the bottom pane too. Repeat the same for each field that you would like to and in the query.
By default the show option is checked. This indicates that the field will be displayed when the query runs.
You can now run the query if you wanted. However mostly you probably want to add some filtering criteria to the query.
Once the table is configured make sure to save it. In any case, you will be prompted to save it when you try to switch to Datasheet View or close the table.