# Panel Fields

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

![Key Information](https://797708323-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-Liw6C9Fe7rohFtkU25j%2F-MWisLPeaYqoUbUxjywr%2F-MWxUkz3-g7mq722x-as%2FScreenshot%202021-03-29%20at%2012.19.38.png?alt=media\&token=f2a3a75e-52ec-4512-ac3b-90fc0650ee9d)

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 %}

![Editable fields](https://797708323-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-Liw6C9Fe7rohFtkU25j%2F-MWisLPeaYqoUbUxjywr%2F-MWxU1J6hiPxPVBLvRnZ%2FScreenshot%202021-03-29%20at%2012.16.28.png?alt=media\&token=b1e0b8a7-e9a3-42f3-9762-9d2d85272b41)

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-5.37/voyage-management-system/step-by-step-guides/laytime-calculations/maintain-laytime-calculation/manage-cargo-ports)
{% endcontent-ref %}