# Panel Fields

The top section of the overview tab contains key information about a laytime.

![Key information](https://697901865-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FVyWYT6GQ4usHD0nNNsUc%2Fuploads%2FqPpcKlnxX8wyH0YghhLz%2FScreenshot%202021-11-30%20at%2011.35.52.png?alt=media\&token=7ea1b3cb-8d59-4514-b956-3cff24a7d553)

The next section contains the following fields that can be edited. 

| Fields         | Description         |
| -------------- | ------------------- |
| Aggregation    | Type of aggregation |
| Demurrage Rate | Rate of demurrage   |
| Despatch Rate  | Rate of despatch    |

{% hint style="info" %}
An aggregation can be the following types:

* Averaged
* Reversible
* Non-reversible
  {% endhint %}

![](https://697901865-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FVyWYT6GQ4usHD0nNNsUc%2Fuploads%2FbVywTdEWSRUGF8QAipmY%2FScreenshot%202021-12-02%20at%2008.36.48.png?alt=media\&token=5e424967-fefc-41ee-afe6-2d44c66add57)

A laytime calculation panel also contains a section for managing cargo ports:

{% content-ref url="manage-cargo-ports" %}
[manage-cargo-ports](https://docs.dataloy.com/release-6.16/voyage-management-system/step-by-step-guides/laytime-calculations/maintain-laytime-calculation/manage-cargo-ports)
{% endcontent-ref %}