The discount applicator POS tile allows you to apply multiple manual discounts to a specific location based on a metafield value. These can be any manual discount code, including Shopify native, Stackable, and from other apps.
The first step is to go to the settings for the specific location you'd like to use this on, which you can find in your store's settings page, under "Locations". Select the location you want to work with, and then click on "View all" in the Metafields section:
You can then add one or more codes to the "POS Applicator Discounts" metafield, and hit save:
On your POS, or via the admin panel, add the 'Discount applicator' tile to your grid:
Now, you can tap the 'Apply discounts' grid tile, and your discounts will be applied to the cart: