public function shift($StartAngle, $EndAngle, $Offset, $Reversed)
    {
        if ($Reversed) {
            $Offset = -$Offset;
        }
        foreach ($this->LabelPos as $Key => $Settings) {
            if ($Settings["Angle"] > $StartAngle && $Settings["Angle"] <= $EndAngle) {
                $this->LabelPos[$Key]["YTop"] = $Settings["YTop"] + $Offset;
                $this->LabelPos[$Key]["YBottom"] = $Settings["YBottom"] + $Offset;
                $this->LabelPos[$Key]["Y2"] = $Settings["Y2"] + $Offset;
            }
        }
    }