I don't know why this is so difficult for me!  i simply want an elevation tag that i would use in an elevation or section drawing that automatically sets the Y coordinate distance from a defined 0 point.  I googled and searched and even on this forum i can't find that kind of tag.  i find all kinds of "dynamic" tags that have fields that allow you to input info manually for each tag, but not what i need.  It's like no one even needs a tag that does this  - do you all just manually measure every elevation and then had write in that number in every tag?  I'm sure it's just me.  Please help!Thanks,Ben

Hello CDS Ben, try the command DIMORDINATE.
It will lay a "X" direction or "Y" direction indication of the distance from the coordinate 0,0.
If you set a special dimension style you will be abble to write automatically for example : +173.528 m for a distance of 173528 mm from the zero ( or the equivalent in feet ).
Eventually see my file FEET-METERS.dwg here in the CAD BIM Blocks library. 

Here is a description for a custom lisp routine that will display an elevation marker.****************This relatively simple program allows the user to continuously place elevation markers composed of a variable width
polyline and single-line text object at specific points in a drawing.

The program will continuously prompt the user for a
point at which to display the elevation, and proceed to create an
LWPolyline marker accompanied by a single-line Text
object displaying the value of the UCS Y-coordinate of the picked point.

The units and precision of the value displayed are controlled by the settings of the LUNITS
and LUPREC system variables respectively.

The text height, offset and size of the marker are all dependent upon the value of the
TEXTSIZE system variable.**************Would it be of any use to you?

Sure, I'd give it a trythanks,ben

Then you need not do nothing more than click on the link below, download the program and give it a try.http://lee-mac.com/elevationmarker.htmlI vouch wholeheartedly for the author.

Thanks!