This is a template attribute. Template attributes can be used in filtering, or to retrieve data from the model to use in drawings and reports. For example, when you create a report, Tekla Structures replaces the attributes added in the report template with the corresponding object property values.

This attribute shows the bottom level of a cast unit. Bottom level takes the unit and accuracy from the MarkDimensionFormat.dim dimension property file. You can modify the settings saved in MarkDimensionFormat.dim in the dimension properties property pane in a drawing.

You can use this attribute as a user-defined attribute also in part marks and associative notes.