You can add elevation dimensions (level marks) in your drawings for the start and end points of parts in integrated dimensioning. Tekla Structures dimensions elevations relative to a reference point, which you can change.

1. Go to the Position dimensions tab, and set Elevation dimensions to On.
2. Click OK.
3. In the drawing properties dialog box, click View > Attributes 2.
4. Do one of the following:

   • To use a specific value, select Specified from the Datum point for elevations list and enter a value in the Datum level box.

   • To measure elevations relative to the view plane, select view plane from the Datum point for elevations list.

5. Save the drawing properties and create the drawing.
6. To change the prefix, open the dim_operation.ail file in a text editor that supports UTF-8 coding. Recommended editors are Visual Studio and Notepad++.

   This file is located in the Tekla Structures/<version>/messages/ folder. Replace EL with a new prefix on the following line in the file:

   string dim_operation_dim_elevation_prefix{entry = ("enu", "EL");};