# Theme designer

Other administrative forms > Theme designer

This system form is useful to style the elements of your application, such as headers, buttons, toolbars, fields and much more, including customizing your menu with your company’s logotype.

Try the settings under the **Menu area**, **Main area**, and **Font** and verify that every looks as expected in the **Preview** section. When you are ready, enter a **Theme name** under the **Misc** section and click on **Save as** to confirm.

For later changes to your previous created theme, click on **Save**.

Use **Custom logo URL** to display an image at the bottom of the application menu. The URL can be from:

-   Your own website, like _[https://www.istools.com/wp-content/uploads/2023/06/New-Project-55.png](https://www.istools.com/wp-content/uploads/2023/06/New-Project-55.png)_

-   Your IS Tools application, i.e., an image stored in a File field of some record.

    **Syntax**

    ```
    https://{server}/istools/apps/{appId}/tables/{tableId}/records/{recordId}/fielddata/{fieldId}
    ```

    **Example**

    ```
    https://swe02.istools.com/istools/apps/1801/tables/1/records/100551/fielddata/100500
    ```

    There are two ways to obtain this link:

    1.  Use the syntax above, and look for the requested parameters as follows.

        -   The _server_ and _appId_ can be seen in the URL of any opened application form.

        -   The _tableId_ and _fieldId_ can be seen in [Tables](tables.md) and [Fields](fields.md), respectively, in the Data model editor.

        -   The _recordId_ can be obtained via [IQL in Forms](iql_in_forms.md) (e.g., with _set @var = recordId_ on `Run on select`, or with _set :caption = RecordId_ on `Behavior` of a Label in a section).

    2.  Temporarily place a [Media](form_designer_components.md#_media) component associated with the [File field](field_types.md#_file) in question in any form you like. Open the form, right-click on the Media, and click "Copy link address". Paste this link exactly as is.

> **Note:**
> 
> Note that all themes you create will be available for users in the [User settings](user_settings.md) form.