# Add Remove Theme Files

> important RadThemeManager cannot load the theme if it is saved as package (tssp file). This is shown in the following article: [using custom themes](https://docs.telerik.com/devtools/winforms/styling-and-appearance/using-custom-themes)
> To edit the list of themes loaded into a Theme Manager, follow these steps:

1. Select the RadThemeManager control, and then open its **Smart Tag** menu.

   ![tools-visual-style-builder-adding-custom-themes-to-your-application-editing-themes 001](https://www.telerik.com/products/winforms/documentation/assets/b8e58e16608b7f4abcee3a3d20f46705/tools-visual-style-builder-adding-custom-themes-to-your-application-editing-themes001.png)

2. Select **Edit Themes** to open the **ThemeSource Collection Editor**.

   ![tools-visual-style-builder-adding-custom-themes-to-your-application-editing-themes 002](https://www.telerik.com/products/winforms/documentation/assets/ac566d603e577a724f59d2b537f39289/tools-visual-style-builder-adding-custom-themes-to-your-application-editing-themes002.png)

3. Click **OK** when you are finished working in the editor.

## To Add a New Theme to the Theme Manager

1. Click **Add**.

2. Choose the **StorageType** for the theme. Select **Resource** or **File**.

3. Set the **ThemeLocation** (resource name or file location).

## To Remove a Theme from the Resource Manager

1. Select the theme that you wish to remove.

2. Click **Remove**.

## To Change the Properties for an Existing Theme

1. Select the theme that you wish to edit.

2. Set the **StorageType** and **ThemeLocation** properties to your desired values.

> caution When setting the **ThemeLocation** for a **Resource** storage type be sure to include the project namespace. The naming convention for ThemeManager to find the resource is \<my project namespace>.\<theme name>.xml. In project "MyProject" with theme resource file "MyTheme.xml", the fully qualified resource name should be entered as "MyProject.MyTheme.XML".

## See Also

* [Adding RadThemeManager to a Form](https://www.telerik.com/products/winforms/documentation/tools/theme-manager/adding-radthememanager-to-a-form)

* [Applying a Theme to a Control](https://www.telerik.com/products/winforms/documentation/tools/theme-manager/applying-a-theme-to-a-control)

* [Load Themes from a Resource](https://www.telerik.com/products/winforms/documentation/tools/theme-manager/load-themes-from-a-resource)

* [Load Themes from an External File](https://www.telerik.com/products/winforms/documentation/tools/theme-manager/load-themes-from-an-external-file)