90 Geometric Dimensioning and Tolerancing Symbol Specifications H = Letter height Datum Target Point Datum Target Line Datum Target Line Dashed leader indicates opposite side of part 90° Target area Target line Target point 2H Thick On the drawing, the datum target symbol is connected with a leader to the datum target point, line, or area. This leader line generally has no shoulder or arrowhead associated with leaders. Example applications of datum target points and datum target lines are shown in Example 3-14. Example applications of datum target areas are shown in Example 3-15. Additional uses are provided where they relate to specific applications. Example 3-14. The datum target point and datum target line and examples of their use.