This video shows how to toggle the iPad's Virtual Keyboard On when the BT-105 or DIGIT is paired to your device.
Pair the BT-105 or DIGIT to your iPad, open a text field within a compatible App and select the text field by tapping in it. Press the power button once. The Virtual Keyboard will pop up. To continue using both the BT-105/DIGIT and the Virtual Keyboard, tap any part of the screen that does not require text input. Tapping the "hide keyboard" button on the bottom right corner of the Virtual Keyboard will toggle the Keyboard Off. Re-activate by repeating the above steps.