After splitting a check, you can always merge those checks back together:
- Tap the Split check button on the bottom right of the Register screen below your menu sub-screens and items, which will open the Split check 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 checks together by selecting the checks you wish to combine.
- When you're done, select Merge at the bottom of the window.