Data Exchange > Creo Legacy Migration > Creating Annotations > About Annotating Legacy Drawings
About Annotating Legacy Drawings
Annotations on drawings store model information. You can use commands on the Annotations tab of Legacy Migration to annotate legacy drawings so that they include dimensions and other details such as geometric tolerances, notes, and symbols.
You can create standard, reference, and ordinate dimensions on the legacy drawings. Select one or more references to create angular, linear, or radial dimensions or add dimensions between a common base object and one or more other objects. Reference dimensions are similar to standard dimensions except that they are read-only for information and are identified by the notation REF that follows their values. Use new or common references to create standard and reference dimensions.
Ordinate dimensions measure a linear distance from a baseline object and are associated with the baseline reference. Ordinate dimensions are automatically created or you can create them. Creating ordinate dimensions consists of establishing a baseline and dimensioning geometry to the baseline.
You can create geometric tolerances and place them as free notes or attached to dimensions on the legacy drawings. Geometric tolerances are the maximum allowable deviation from the exact sizes and shapes specified in the model design. They provide information on acceptable deviations of models. To create geometric tolerances on drawings, you must set datums as references and create basic dimensions.
LDA allows you to insert notes and symbols on the legacy drawings to add information and detail. You can use the Note commands on the Annotations tab to insert notes of the following types in the drawings:
Unattached notes—Notes not attached to any reference items on the drawings.
Offset notes—Notes placed offset from a selected reference item on the drawings.
On-item notes—Notes directly attached to the items you select on the drawings.
Leader notes—Notes with leaders.
Tangent and normal leader notes—Notes with tangent or normal leaders. Tangent and normal leaders are oriented tangent or perpendicular to the selected reference items on the drawings.
Surface finish is a measure of the deviation of a part surface from its normal value, such as the roughness of surfaces. Though surface finishes are associated with surfaces, the surface finish information is displayed as symbols on drawings. You can add standard surface finish symbols from a specified directory or symbol library to legacy drawings or create your own surface finish symbols and place them attached or unattached to geometry on the drawings.
Additionally, you can match and associate unmapped legacy annotations on the drawing, such as dimensions and notes, with draft annotations. You can use commands on the Annotations tab to create draft dimensions and notes to match the legacy annotations that you select on the drawing.
Drawing entities such as dimensions and tolerances are associated with the model. For example, changes to drawing entities that are saved within the model can result in design changes in the model. Modifying dimension and tolerance values and saving them in the model can result in design changes of the model. You can right-click the drawing and click Update Sheets to update the views on the drawing sheets for model changes.