You are reading the documentation for an older Pickit release (2.0). Documentation for the latest release (3.3) can be found here.
Maximum angle between pick and reference frame Z-axis
With this setting, you can specify the maximum angular difference between the Z axis of your pick frame and the Z axis of your reference frame. As seen in the image below, if an object is tilted more than the maximum specified angle, the object will be labeled as unpickable and not sent to the robot. In the Pickit web interface, unpickable objects are displayed orange in the Objects view and the Detection grid.