Go to Items in the main navigation menu.
Press Custom Attributes in the upper right corner.
Press + New Product Attribute.
Under ATTRIBUTE CODE, enter age_verify.
Under ATTRIBUTE NAME, enter Over 21?.
Under CUSTOM ATTRIBUTE TYPE, select Product attribute / string.
Under FRONTEND INPUT TYPE, select Select.
Press + Add New.
Under VALUE, enter true. Under LABEL, enter True or YES.
Press + Add New again. Under VALUE enter false and under LABEL, enter False or NO.
Under UI COLUMN SIZE IN POS, enter 3.
You can leave the dropdown menu under SHOW ON QUICK UPDATE FORM blank.
Create an Age Verification Attribute
If you want an age verification prompt, you will need to create this attribute in the backend of the POS.