Atn x-sight 3x9

I just got the Atn x-sight 3x9. During the one shot zero is there any way to adjust magnification. There is an icon that says zoom on the screen that looks similar to an hour glass. I have yet to figure it out. Any advice would be greatly appreciated. I can't find the answer anywhere.
If you have the ltv, the default is at 3 power, no way to magnify during one-shot-zero