I am using an app deployed using a managed package.
I've added a custom field to one of the package's custom objects.
When I'm trying to edit this new field I see it does not appear on the detail page edit mode (It is visible only on the view mode).
Is there any config param I need to change in order to be able to edit this new field?
It is likely field level security or a setting on the field layout item. First find your field on the object and click the View Field Accessibility and Set Field-Level Security buttons to review. Also click the config icon next to the field in the Layout and check its properties.