Hi, I added a new entry in the jQuery Library: <https://wiki.koha-community.org/wiki/JQuery_Library#Preserve_white_spaces_of_Control_Fields> The purpose is to simplify the analysis of control fields 00x, especially 000, 006, 007, 008. They are shown preserving white spaces, each char in a box, and its position is shown on mouse hover. You can test it opening a bib or auth record in MARC view, and pasting the code in the browser console. Any comment is appreciated. Stefano