This plug-in can quickly mark relative elevation. There are two commands in total. You can set the elevation of the datum through the "set origin elevation" command. The default elevation of the datum is 0; the "elevation Annotation" command is used to quickly mark the elevation, as long as you click the automatically snapped point with the mouse. ...

The coordinate tool plug-in is a set of powerful and comprehensive coordinate creation tools. You can manually or accurately create coordinate dimensions of various types and units, and when you activate the command, you can automatically update the dimension value by any modification and movement. Also supports converting level dimensions to SketchUp default text dimensions

You can find the text content in the replacement model.