The LG Joy does not have a current keypad, as we have seen in several videos circulating on the network, this terminal does not have any buttons or the frame or the front of the unit. The only buttons with what counts is the volume and power on the rear part thereof. This is not a problem to capture the screen of your Android as we would from any other terminal with the current keypad.
To capture the screen using the keypad only we press the button once Power + volume down, although it is true that it is a bit tricky given the placement of those buttons, but I can assure you that with a little practice It makes the best way to make a quick capture of all our desktop.