What must you do to switch to SQL view for modifying a query?

To switch to SQL view for modifying a query, using the View button arrow in the Results group is the correct approach. When working with Microsoft Access, the View button provides accessible options to change the display format of your query. By clicking this arrow, you can easily select SQL View from the dropdown menu, which allows you to directly view and edit the SQL code associated with your query.

This method is particularly useful because it allows you to transition seamlessly between different views without needing to navigate through multiple tabs or memorizing keyboard shortcuts. Users often find the graphical representation helpful for building queries, and accessing SQL View directly supports users who are familiar with SQL syntax and want to make more advanced modifications without the constraints of the graphical design interface.