---
title: "Parameters"
slug: "parameters"
updated: 2024-09-03T10:27:29Z
published: 2024-09-03T10:27:29Z
canonical: "help.mail-and-deploy.com/parameters"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.mail-and-deploy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Parameters

### General

Parameters can be used to allow callers of the report to pass information to the report.

          
          

> **Example:** A user requesting a report document from the [Hub](/release35/docs/introduction-to-mail-and-deploy-hub) can supply values for parameters which can then be used by the report to filter a [Datasource](/release35/docs/introduction-to-datasources) field.

The value of a parameter can be acccessed from every [Expression](/release35/docs/introduction-to-mail-and-deploy-expressions) within the [Report](/release35/docs/introduction-to-reports) by using a [Report Parameter Placeholder](/release35/docs/report-parameter).

### Properties

Every report parameter has the following properties:

| Name | Description |
| --- | --- |
| Name | The name of the parameter. |
| Default Values | A list of [Expression](/release35/docs/introduction-to-mail-and-deploy-expressions) that represent the default values of the parameter. Default values of a parameter will be used if the caller of the report does not provide values for the parameter. When a preview is created from a report, default values will be used for all parameters of the report. |
| Hub Input Field | A [Hub Input Field Specification](/release35/docs/hub-input-field-specifications) that defines how users can enter values for the parameter in the [Hub](/release35/docs/introduction-to-mail-and-deploy-hub). |

### Managing Report Parameters

You can manage parameters of a report in two ways:

- Launch the [Management Service](/release35/docs/services), click *Reports* in the main menu and then click the edit button for the report you want to edit.
- Start the [Report Designer](/release35/docs/report-designer) for the report you want to edit or design and add parameters by right-clicking the *PARAMETERS* folder and selecting *New Parameter*, edit a parameter by selecting it in the content explorer under the *PARAMETERS* folder or delete a parameter by right-clicking it an selecting *Delete Parameter*.