If desired, you can round off discounts that you apply in the cash register.
You can set this via:
1. Settings
2. Click "Register"
3. General Settings
4. Round off discounts - click to get selection menu
5. Save
This means that the amount per cash line is adjusted to the rounding off.
So not the total amount is round off, but per service and per product.
Standard discount 10% without rounding: 10% from € 29 = € 2.9
Customer pays € 26.10
Discount 10% with € 0.5 rounding up: 10% of € 29 = € 2.9
-> is rounded up to € 3
Customer pays € 26.