What is a POS modifier?
A modifier is an option added to an item at the till, such as extra cheese or oat milk, with or without a price, that also prints on the kitchen ticket.
Modifiers change how an item is made without making it a different product. 'No onion', 'extra shot', 'oat milk +$0.75', 'well done' and 'add bacon +$2.00' are all modifiers. They print on the kitchen ticket under the item so the cook sees exactly what to make, and paid modifiers add their price to the line on the bill.
Modifiers are organised in groups attached to products. A burger might carry a 'Cheese' group (cheddar, swiss, none), a 'Doneness' group and an 'Add-ons' group. Groups can be optional or required, and can allow one choice or several. A good set-up keeps groups short and reuses them across items so staff learn them once.
The common mix-up is modifier versus variation. A variation is a different version of the product with its own price and often its own stock and SKU: small, medium and large, or red and blue. A modifier is an add-on or instruction on top of whichever version was chosen. A large latte (variation) with oat milk (modifier) is the classic example.
In SeroPOS, Modifier Groups are set up in the app's Admin (options with prices) or in the back office under Products, then Modifiers, where each modifier can have a price, a food type and an image, and sets are mapped to products. At the till the 'Choose modifiers' sheet opens after the item is tapped; in QSR Mode it opens when Modifier Popup is on. Modifier sales show in the Add-ons (Modifiers) section of the DSR.
A medium latte is $4.95. The guest adds oat milk (+$0.75) and an extra shot (+$1.00) and asks for 'extra hot' (no charge). The line totals $6.70, the bill shows the two paid modifiers, and the barista's ticket reads: Medium Latte, Oat milk, Extra shot, Extra hot.