Highlight query from the Queries form and press Properties.
Note: When you attempt to edit a query that is already in use, a list of browse lists, reports, and graphs the query is used by is displayed (if the query is already used). Press OK. Avoid modifying existing queries since this could invalidate the browse list, report, or graph using the query. If you must modify an existing query we recommend creating a new query and making a copy of an existing query.
The Query Designer form is displayed.