A line annotation: a single straight line, optionally a dimension line with leader lines and a caption.
public sealed class PdfLineAnnotation : PdfMarkupAnnotation
ISO 32000-2 §12.5.6.7, Table 178 (PDF 1.3).
kind:method, kind:property, kind:ctor. Press Esc to clear.CaptionOffsetGets the offset of the caption from its position (CO, PDF 1.7); default (0, 0).CaptionPositionGets where the caption is placed (CP, PDF 1.7); default inline.EndGets the end point of the line (L, required); the origin when L is missing or malformed.EndLineEndingGets the line ending at the last point (LE, PDF 1.4); default none.HasCaptionGets a value indicating whether the text is shown as a caption with the line (Cap, PDF 1.6); default false.InteriorColorGets or sets the interior colour (IC, PDF 1.4), or null for none; setting null removes it, and the appearance is kept until RegenerateAppearance().LeaderLineExtensionGets the length of the leader line extensions (LLE, PDF 1.6); default 0.LeaderLineLengthGets the length of the leader lines (LL, PDF 1.6); default 0. Positive values extend above the line, negative below.LeaderLineOffsetGets the length of the leader line offset (LLO, PDF 1.7); default 0.MeasureGets the measure dictionary giving the scale and units of the annotation (Measure, PDF 1.7), as stored, or null.StartGets the start point of the line (L, required), in default user space; the origin when L is missing or malformed.StartLineEndingGets the line ending at the first point (LE, PDF 1.4); default none.