I am not sure if I understood the question correctly, but if you want to change the text in labels, go to ETemplate >> ETemplate Editor >> Type in the name of ETemplate name (addressbook.index) >> then double click on the label you want to edit, change the text and save. Also make sure you change the value of the respective label that would be coming from the database which would look like ${row}[column_name].
This is the first time I am trying to answer a question, don’t mind if I have not understood the question correctly.