The Elevation Marker Counter is the character (e.g. A, B, C, D) associated with a particular elevation.
Also see Elevation, Elevation Label, Elevation Dimension & Create Multiple Elevations with Plan Details
To pull up the Elevation Marker Counter function:
1. Select the Insert menu and select Elevation Marker Counter.
2. Elevation Marker Counter window will open.
3. Choose to either Reset to Tag: A, or select Elevation Number to correspond with Tag Marker character for ICE 2D elevation.