vevor 80w co2 laser cutter manual lower the lifting plataform

Hello again guys!

I got a vevor 80w co2 laser cutter, this is my first laser machine that the plataform does not comes up/down with the control panel.
I need lower the plafaform like 1/2 inch so the material can be feed from a vent on front/back of the machine, so I can use long stripes of material, instead of squares with the exactly working area.

Does anyone knows how to lower the lifting plataform manually?

Thanks!

HAVE YOU GOT A PIC OF SAID MACHINE??