1. From the Minfos Till:

2. Add all products to a sale.

3. Click one of the quick discount buttons, located on the bottom left of the Till window (for example, 10% Disc.).
Alternatively, to apply a different discount value, click Disc All, enter the discount percentage, then click Enter.

Note: By default, a product cannot be discounted if it is marked as non-discountable, or if it is a script. Till preferences can be changed to allow private scripts to be discounted if desired.

4. Complete the sale as normal.

Note: The quick discount buttons can be set to your store requirements; this can be found in Shop Configuration.