1. In your software go to Definitions - Shifts - Shifts
  2. Highlight/click on the shift group in question
  3. Double click the specific shift to change within that shift group
 
Change the Lunch or Break Duration Image 1
 
        4. Double click the Lunch/Break you want to edit
 
Change the Lunch or Break Duration Image 2
 
        5. Change the duration to desired duration and press Ok.
 
Change the Lunch or Break Duration Image 3
 
 For more info on Lunches/Breaks see this article.