These features are exclusive to the PREMIUM version only.
CONTROL PRINTOID WITH A KEYBOARD
The Premium version of Printoid can be piloted by using a physical keyboard. This is pretty simple: just plug an USB keyboard (or connect a Bluetooth keyboard) to your device, then open Printoid.
Read the tutorial
CONTROL PRINTOID WITH ADB
The Premium version of Printoid can be piloted by using the Android Debug Bridge (ADB). Following is a link to learn more about ADB: https://developer.android.com/studio/command-line/adb.html