pdfSetTextFixedLineSpacing
Set the text line spacing.
void pdfSetTextFixedLineSpacing(double lineSpacing)
This function sets the line spacing, or vertical character pitch, in
points. This value is used only in line printer mode; it will be
ignored in other modes.
If the line spacing is set to zero (the default value), line printer mode will automatically compute the vertical spacing.
This setting is global - it applies to all PDF handles.
C:
pdfSetTextFixedLineSpacing(10.0);