edit rendering style for build in field summary under field configurations

[Shweta Nayak]

I don't see the option to edit rendering style for build in field summary under field configurations? Why is that so and how can I edit it?

[Nic Brough -Adaptavist-]

I'm not sure I understand the question - "rendering style for build in field summary" is unclear - do you mean the summary field?  Or is "build" the field?

If you are talking about the standard "summary" field, then there is no rendering options because it is a simple short-text field, and they don't need rendering.