How can i add new custom field in post settings?

[Gigagom]

Hello, i want to add a image gallery to post settings for displaying a galleries on archive page.
Can i do it with piranha?
Please show me how to add a custom field to a post settings.

[tidyui]

You can tell a Region to be rendered in the settings panel by using Display = RegionDisplayMode.Setting. For more information, take a look at https://piranhacms.org/docs/master/content/regions.

Best regards

[Gigagom]

Thanks a lot, now it appears in the settings!
But how can i get gallery images with call to _api.Archives.GetByIdAsync?
Or I can get data from a custom post field only by iterating over all posts