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                                                  627
          SECTION 8.4                                                                Anno ta tions



KEY          TYPE         VALUE

LL           number       (Required if LLE is present, otherwise optional; PDF 1.6) The length of leader lines
                          in default user space that extend from each endpoint of the line perpendicular to
                          the line itself, as shown in Figure 8.5. A positive value means that the leader lines
                          appear in the direction that is clockwise when traversing the line from its start-
                          ing point to its ending point (as specified by L); a negative value indicates the op-
                          posite direction.
                          Default value: 0 (no leader lines).

LLE          number       (Optional; PDF 1.6) A non-negative number representing the length of leader
                          line extensions that extend from the line proper 180 degrees from the leader
                          lines, as shown in Figure 8.5.
                          Default value: 0 (no leader line extensions).

Cap          boolean      (Optional; PDF 1.6) If true, the text specified by the Contents or RC entries
                          should be replicated as a caption in the appearance of the line, as shown in Fig-
                          ure 8.6 and Figure 8.7. The text should be rendered in a manner appropriate to
                          the content, taking into account factors such as writing direction.
                          Default value: false.

IT           name         (Optional; PDF 1.6) A name describing the intent of the line annotation (see also
                          Table 8.21). Valid values are LineArrow, which means that the annotation is in-
                          tended to function as an arrow, and LineDimension, which means that the anno-
                          tation is intended to function as a dimension line.

LLO          number       (Optional; PDF 1.7) A non-negative number representing the length of the lead-
                          er line offset, which is the amount of empty space between the endpoints of the
                          annotation and the beginning of the leader lines.

CP           name         (Optional; meaningful only if Cap is true; PDF 1.7) A name describing the anno-
                          tation’s caption positioning. Valid values are Inline, meaning the caption will be
                          centered inside the line, and Top, meaning the caption will be on top of the line.
                          Default value: Inline

Measure      dictionary   (Optional; PDF 1.7) A measure dictionary (see Table 8.110) that specifies the
                          scale and units that apply to the line annotation.

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