Add Z & M coordinate values to geodatabase files

Discussion created by HealdsburgCA on Jul 26, 2012
Latest reply on Feb 19, 2014 by HealdsburgCA
Greetings all,
  I have a dozen utility shapfiles which I imported into a geodatabase.  I now need to add linear referencing & elevations to the feature classes.  Is there a method to adding M & Z coordinate capability to the feature classes when you aren't creating the feature classes from scratch? 

Attached is an image of ArcCatalog which shows that the M & Z value check boxes are greyed out in the existing/imported feature class.

Thanks in advance!