Adds a line annotation from start to end; its rectangle is fitted to the line.
public PdfLineAnnotation AddLineAnnotation(PathPoint start, PathPoint end, PdfAnnotationOptions? options = null)
The start point in default user space.
The end point.
Colour, width, flags and markup texts; null for a one-point red line.
ISO 32000-2 §12.5.6.7, Table 178 (L, PDF 1.3). Line endings are not drawn.