Does Oliver POS support the A4 receipt format?

How to change the receipt size of my register at Oliver POS

Yes, Oliver POS supports 4 different types of receipt sizes. They are:
- Letter Head
- A4
- 52mm
-80mm

To change the receipt size, click on Settings and select Registers. Once in the Registers page, select a register. Under the Details tab, find the option for Receipt Size. From here, the size of the receipt can be adjusted.