# How to modify existing macros of DBT

**URL:** <https://discourse.getdbt.com/t/how-to-modify-existing-macros-of-dbt/2276>\
**Category:** Archive\
**Created:** [March 17, 2021, 2:47am UTC](https://discourse.getdbt.com/t/how-to-modify-existing-macros-of-dbt/2276 "2021-03-17T02:47:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![artijain](https://avatars.discourse-cdn.com/v4/letter/a/c37758/32.png) [@artijain](https://discourse.getdbt.com/u/artijain)\
**Post date:** [March 17, 2021, 2:47am UTC](https://discourse.getdbt.com/t/how-to-modify-existing-macros-of-dbt/2276/1 "2021-03-17T02:47:14Z")

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Hello All,

I would like to know if we can modify the already existing macros of some materializations such as “Snapshot”.  
When I try doing this it does not work for me and even though I have specified different values for column. DBT still functions according to its default behaviour.

Please advise