PdfStandardLayoutAttribute.LineHeight Property
Gets or sets the line height.
Property Value
The element's preferred height, measured in default user space units in the block-progression direction.
Remarks
The value -2 means "Normal" (Adjust the line height to include any non-zero value specified for BaselineShift), the value -1 means "Auto" (Adjustment for the value of BaselineShift shall not be made).