[Koha] MARC modification templates

[Сычев Игорь Алексеевич]

Hi!

How to use "MARK modification templates" if you need to replace only a part? 
For example: 
856 4 _uhttp://aeer.ru/files/io/m14/art_17.pdf 
need to get: 
856 4 _uhttp://old.aeer.ru/files/io/m14/art_17.pdf

https://koha-community.org/manual//24.11/en/html/cataloging.html#marc-modification-templates

Good Luck!

Igor A. Sychev
Tomsk Polytechnic University
https://lib.tpu.ru