Using Custom Forms, lunch break periods can be dynamically accounted for with a simple check box on the shift in question.

If you want a more static/rigid approach to lunch break calculations, be sure to check out this article.

The image below concisely lays out the necessary steps to configure & subsequently leverage custom forms and shift modifiers to dynamically account for lunch breaks.

These dynamic adjustments affect the reported shift hours, not the scheduled shift hours. So if someone is working 6a-2p, and applies a 30 minute lunch period adjustment, the schedule would still show 6a-2p, but their timesheets, payroll hours, etc. will be adjusted up or down by 30 minutes following the custom form adjustment you configured.