Hi!

There are two ways in which you can correct the level settings of your build plate. It is done automatic or manually. For automatic, you need to select Utilities from the LCD panel and go to Level Built plate. You will be guided into leveling your knobs on the underside of the build platform. If not, you can do it manually by following the steps below:

1. Go to the Utilities menu on the LCD screen and select Home Axes.
2. Manually move the extruder to different points above the build plate. At each point, use a piece of paper, feeler gauge, or other measuring tool to gauge the distance between the build plate and extruder nozzle. The distance should be about 75% of your planned layer height.
3. At each point, turn the leveling knobs beneath the build plate to the left to raise the build plate and to the right to lower it.

If not, the issue may be on your switch, or it could be a problem in your z axis. Let me know if this works for you.