A simple video on youtube show how to use it. https://www.youtube.com/watch?v=LShNM4jFwuM

The display screen has only one knob, and the knob can rotate and press left and right.

• Rotate: change the menu item to be selected, change values, change engraving speed, etc..

• Press: pop-up menu, confirm the choice.

Just need to download the last firmware file, unzip to the TF card's root directory.

See more detail

Notice: The Display software may be updated, the pictures bellow is just for a example.