import arcpy, os, sys

arcpy.env.workspace = arcpy.GetParameterAsText(0)

for fc in arcpy.ListFeatureClasses():
    arcpy.AddMessage("Adding fields and updating " + fc + "...")
    arcpy.AddField_management (fc, "KM_FontSize", "DOUBLE")
    arcpy.CalculateField_management(fc, "KM_FontSize", "!FontSize!")
    arcpy.AddField_management (fc, "KM_VerAlign", "SHORT")
    arcpy.CalculateField_management(fc, "KM_VerAlign", "!VerAlign!")
    arcpy.AddField_management (fc, "KM_HorAlign", "SHORT")
    arcpy.CalculateField_management(fc, "M_HorAlign", "!HorAlign!")
    arcpy.AddField_management (fc, "KM_XOffset", "DOUBLE")
    arcpy.CalculateField_management(fc, "KM_XOffset", "!XOffset!")
    arcpy.AddFieldmanagement (fc, "KM_YOffset", "DOUBLE")
    arcpy.CalculateField_management(fc, "KM_YOffset", "!YOffset!")
    arcpy.AddMessage("Finished updating " + fc + "...")