\indexformat1{\respectcase{no}                                                                                                    
     \style{indent}                                                                                                               
     \leadering{no}                                                                                                               
     \everyletterbreak{\vs{1\bl}}                                                                                                 
     \indentsubentry1{1em}                                                                                                        
     \indentsubentry2{2em}                                                                                                        
     \everyhang{1.5em}                                                                                                            
     \everyindex{\tenpt}}