Reducing node z co-ordinate level.

I have a survey in autocad. I want to reduce the node z coordinates by 1m. Does anyone know if this is possible. This would be an easy task in the surveying software.

I have a survey in autocad. I want to reduce the node z coordinates by 1m. Does anyone know if this is possible. This would be an easy task in the surveying software.

This is an easy task in plain AutoCAD. Select all the nodes, and Move them all by one metre in the z direction, i.e. Move @0,0,-1

Or if you want to reduce the figured elevations, use the lisp TextMath (to be found in the Forum by searching)

Its so easy when you put it like that, getting the text lisp to work might be another thing. Thanks.