LattePanda Forum

Currently. I have 19 digital inputs and 4 outputs configured on my raspberry PI.
Can I configure all the "green" pin to digital inputs and outputs

http://docs.lattepanda.com/content/1st_ ... roduction/

If yes, how?

The linked document is about LattePanda classic (i.e., ver. 1).
The Green-colored GPIO pins are Arduino (Leonardo compatible, ATmega32u4) pins which can be input or output.
Please see Arduino's own documentation to understand how to use Arduino IDE and IO control.

BTW, LP Alpha is also using ATmega 32u4 as well.