Hello, we bought Colorsource Fresnel V multiverse to replace our traditional Fresnel. After a few tries, I can't find the right method to focus the Fresnel when it is in 1ch mode. Knowing that the 1ch mode controls the intensity of preset 1, I press the zoom button to adjust the angle of the beam but when I leave the focus mode, the Fresnel returns to its initial position. I know I can control all the settings with the other modes but I would like to give lighting designers the option to choose to use the device in a more traditional way. Can someone help me understand the right way to work with this lamp in 1ch mode? Thank you!