Hi @masgarinia
Welcome back to the community!
Would you please share the use case? It would be great to know if there’s something that could be a feature request that will be helpful for the community as a whole.
Is the method you are referring to using a custom app? If you are building a web custom app to make these changes, it’s understandable; however, if you are referring to making changes to the core then it’s advised not to as this will hinder your instance from receiving updates/upgrades.
As for the styling, currently the formal way of doing customizations:
Would be great if you could explain further?
Thanks!