A20-LIME2 GPIO PWR/LED Pins

[njwuh1mll0]

Two mini questions for A20-LIME2:

1) Power button to GPIO_4 - Pin2 and Pin4 => This way safely start and shutdown the board?
2) LED to GPIO_3 - Pin2 and Pin3 => Working external LED that can be turned off/on?

Link to GPIO PDF: https://github.com/OLIMEX/OLINUXINO/blob/master/HARDWARE/A20-OLinuXino-LIME2/A20_LIME2_GPIOs.pdf

Thanks