114 Geometric Dimensioning and Tolerancing Applying a Translation Modifier to a Datum Reference The translation modifier is added to the feature control frame following the datum feature reference and any other applicable modifiers. The translation modifier is used to specify that the basic location of the datum feature simulator is unlocked and free to translate within the specified geometric tolerance. Example 3-43 shows the translation modifier used in an application and the resulting datum reference frame. The Drawing Translation modifier Translation modifier Example 3-43. Establishing a datum reference frame with a translation modifi er. (Continued)