How do I move the voice input button to the numeric keyboard in KitKat? In Android 4.4. KitKat, how do I move the voice input icon, i.e. the one with the microphone icon, from the alphabetic keyboard (next to the spacebar, at left) to the numeric keyboard?

At least up to Android 4.3 It used to be possible to do that via an option in the settings. I checked several times the settings of my Nexus 5 with KitKat, especially the Languages and input section, but I cann't find the option.

Is moving the button still possible? What input method and settings options are required?
If you are running ASOP keyboard, and are on the num pad, you can press and hold the SPACE bar to get the text imput method select. There you can choose Google voice typing.

Esentially
Keyboard -> NUM key -> Long press on space bar -> Google voice input