Trying to get Zemismart ZM25EL into pairing mode…

Hi, I just bought a ZM25EL Zemismart “Smart Tubular Motor” with Zigbee for blinds. But I can’t work out how to get it into pairing mode.

These are the instructions:

IMG_1430 Medium

I have no idea what is meant by step #2’s, “Motor “Di” once” instruction. It looks like a button, but the device only has one button, the “setting button” mentioned in step #1.

IMG_1431 Medium

Does anyone know what’s meant?