The Shift and Ctrl keys, i.e. a total of four, can be used as input device for controlling and recording data (data and switch objects). First of all, you need to configure a device port:
Click category Devices in the Media Pool.
Right-click some free space in the right Media Pool portion and select Add port PC Hardware Keyboard.
Following this, device port Keyboard and folder All devices are displayed in the Media Pool. When you click the plus sign next to the folder All devices, four keys are displayed, which you can drag onto objects and use for controlling purposes.
See also