how to make details form

just like Journal Transfer forms, you click lines and show lines only
this is how to make it

“override init method on lines form, and do like source below for example”

public void init()
{
    HpTbStBarcJour _jour;

    super();
    _jour = element.args().record();
    
    HpTbStBarcUpload_ds.query().dataSourceTable(tableNum(HpTbStBarcUpload))
        .addRange(fieldNum(HpTbStBarcUpload, HpTpStBarcodeId))
        .value(_jour.HpTpStBarcodeId);
}