The sample demonstrates how to navigate through the numeral system options using the Keyboard.

Tab - Like other widgets, the jqxFormattedInput widget receives focus by tabbing into it. Once focus is received, users will be able to use the keyboard to change the selection. A second tab will take the user out of the widget.
Shift+Tab - reverses the direction of the tab order. Once in the widget, a Shift+Tab will take the user to the previous focusable element in the tab order.
Up/Down arrow keys - select previous or next displayFormat option.
Alt Up/Down arrow keys - opens or closes the popup.
Esc - closes the popup.
Enter - selects an item.