To customize the representation and text of a level dimension, the following steps must be performed:
First, the level dimensions must be defined in their original format.
Click the button (or type 'grtcdimlevel' on the command line) and define the desired level dimensions.
Select the elements, then, after automatically reentering the symbol definition menu, generate the symbol basic point coordinates...
... And the text that will be defined by the functionality of the dimension (in our case the level dimension or altitude).
After the definition parameters are set and the symbol saved, it may be applied to the level dimensions.