# Design Time

> caption Figure 1: Smart Tag

![WinForms RadPdfViewer Smart Tag](https://www.telerik.com/products/winforms/documentation/assets/411a2fc630f940aa8d1a8dc191f27c2a/pdfviewer-design-time001.png)

* **Common Tasks**

  * **New Theme Manager**: Adds a new **RadThemeManager** component to the form.

  * **Edit UI elements**: Opens a dialog that displays the *Element Hierarchy Editor*. This editor lets you browse all the elements in the control.

  * **Theme Name**: Select a theme name from the drop down list of themes available for that control. Selecting a theme allows you to change all aspects of the controls visual style at one time.

* **Settings**

  * **Viewer Mode**: Specifies the behavior of **RadPdfViewer** when you left-click in the document and drag across the document:
    * *None*: The document can be scrolled only with the mouse wheel or directly using the scrollbars.
    * *Pan*: The document is scrolled in the respective direction.
    * *TextSelection*: Selection is initiated, which stops when you release the button of the mouse.

* **Learning Center**: Navigate to the Telerik help, code library projects or support forum.

* **Search**: Search the Telerik website for a given string.

## See Also

* [Logical Structure](https://www.telerik.com/products/winforms/documentation/controls/pdfviewer/structure/logical-structure)
* [Visual Structure](https://www.telerik.com/products/winforms/documentation/controls/pdfviewer/structure/visual-structure)
* [Getting Started](https://www.telerik.com/products/winforms/documentation/controls/pdfviewer/getting-started)
* [Element Hierarchy Editor](https://www.telerik.com/products/winforms/documentation/tools/element-hierarchy-editor)