Hello Apidog Support, We are importing our API definition from an OpenAPI 3.0.3 specification. We have several request header parameters where the schema is referenced via $ref. The referenced schema is a string enum, and it also contains the x-apidog-enum extension with names and descriptions. Example: parameters: - in: header name: x-custom-source required: true schema: $ref: '#/components/schemas/SourceSystemEnum' components: schemas: SourceSystemEnum: description: Source system identifier type: string enum: - system-a - system-b example: system-a x-apidog-enum: - value: system-a name: System A description: Example source system A - value: system-b name: System B description: Example source system B After importing the OpenAPI file, the schema itself is recognized correctly in Apidog: if we open the schema/model, the field is shown as an enum and the enum values are visible. However, when we open an endpoint and try to execute a request in the UI, the request header field is displayed as a simple text input. It does not appear as a dropdown with the possible enum values. Could you please confirm whether Apidog supports dropdown rendering for request header parameters when the enum schema is referenced via $ref and includes x-apidog-enum? If this is supported, could you let us know what the expected OpenAPI structure should be? Thank you.