Flatten my Linework

This is topic that seems to come up frequently, so I thought I would refresh everyone's memory on this.  Lots of users tend to use their Civil 3D points to manually draw line work  and aren't real happy with lines they have created because they are elevated from the chosen points.

As you can see from the screen capture above, the line is elevated as we would expect.  Now the user has two options.  The first option we will look at is in the point style.

As you can see in the capture above, we can simply set the point display mode to flatten points to elevation, and set the elevation to zero.  It is important to note that this setting will have no impact on the creation of a surface using these points.  The second option is to set the osnapz variable to 1.  By setting the variable to 1, osnap substitutes the z value of the specified point to the value of the current UCS.  It is worth mentioning that Civil 3D does not save this variable, and thus why it defaults back to 0 each time you open the software.  The only way that I can see to permanently change this would be to add the following line of code to the acaddoc.lsp file.