After splitting a bill, you can always merge those checks back together:
- Tap the button Split bill on the bottom right of the Order screen below your menu sub-screens and items. This will open the Split bill screen.
- Select the button Actions at the top of the desired check and the Actions window for the bill will open.
- From this window, you can merge bills together by selecting the bills you wish to combine.
- When you're done, select Merge at the bottom of the window.