Scalable objects are comparable with AutoCAD label objects. If the scalability is activated, these objects are displayed in the viewports of the layouts and in the model section in the size which is determined by the label scale specified for these sections. You will also find further information about label objects in the AutoCAD documentation.
You can activate the scalability of the ATHENA label objects as a basic setup in the ATHENA options or for the individual object in the display section of the relevant dialog box.