# Installed Extensions

This section of JMap Admin shows the extensions that are installed in the server. The table displays the extension name, its type, class, version and a switch to enable or disable the extension. Disabled extensions do not process queries.

## Extension type

### Server extensions

JMap Server extensions add new functionality on the server side. They can include their own configuration interfaces, which are integrated to JMap Admin. Simply click on the name of a server extension to access its configuration interface.

Extensions can also be reinitialized by pressing the **Reinitialize** button. In this case, they are stopped and restarted, which can be useful if an extension must read configuration files that have been modified, for instance.

This type of extension has permissions. 

#### Permissions 

Administrator permissions for Server type extensions define the administration rights of the extension by users authorized to use JMap Admin.

The **Permissions** section has two tabs: **Permissions** and **Owners**. The owners are the only ones who can manage the administrative permissions for the extension, manage the list of owners and delete it.

A list of users and groups with permissions appears in the **Permissions** tab. Click on ![](/files/Wv4IHtF5wJkbjm3vwjkh) to add new users or groups.

{% hint style="info" %}
Available users and groups are configured in the JMap Server section of JMap Admin. Refer to the [Users and Groups ](/e/administrator/jmap-server-administrator-manual/jmap-server/security/users-and-groups.md)section for more information about managing users in JMap Server.
{% endhint %}

<table data-header-hidden><thead><tr><th width="203.5"></th><th></th></tr></thead><tbody><tr><td>Administrate extension</td><td>Allows an administrator to access the extension’s configuration sections and modify the settings.</td></tr></tbody></table>

### JMap Pro extensions

This extension type add functionality to JMap Pro applications.&#x20;

Generally, an extension adds a new toolbar or new menu items to an application.&#x20;

Using the application deployment tool, you can select the extensions that will be included in a JMap Pro application. Refer to the [JMap Pro Applications](/e/administrator/jmap-server-administrator-manual/jmap-server-applications/deployment-classical-jmap-applications/jmap-pro-applications.md) section for more details on this topic.

### JMap Web extensions

This extension type add functionality to JMap Web applications.&#x20;

## Extensions compatible with JMap NG or JMap Survey

Since JMap NG and JMap Survey applications do not deploy, it is at the project and layer level that some of the extensions need to be configured. The sections [Projects](/e/administrator/jmap-server-administrator-manual/resources-projects/configuring-projects/jmap-extensions-compatible-with-jmap-ng-or-jmap-survey.md) and [Layers](/e/administrator/jmap-server-administrator-manual/resources-layers/configuring-layers/jmap-extensions.md) provide details on how to configure these extensions.


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