After completing a merge process, and setting it to print or email later, the user may discover the need to delete the batch.
This will open the Print Letters Criteria window.

To edit a set of criteria, double click on it.
button.
This will open the Patron Letter window.

button.
Multiple letters can be selected by using OPTION + click (Mac) or CTRL + click (Windows).
Click here for more information on this window.