You can use the Theme Management dialog to perform any or all the following tasks:
Check the version of the themes in use by your project (if any).
Configure the theme shown by the designer. Refer to Designer Theme Selection.
Configure whether the user-agent string is used for runtime theme selection. Refer to Adding Validation to Your Web Forms Page.
To access the Theme Management dialog:
Open any .aspx or .master page that contains an ep:Screen control.
Click on the Design tab to enter design mode.
Click on the ep:Screen control while in design view. You can do this by clicking near the top of design view. An action tab displays for the ep:Screen control. The action tab is a small tab with a right-pointing arrow.
Click on the action tab to display the Screen Tasks.
Select the task Manage Themes.
The Manage Themes dialog presents you with the following fields:
Current Mobile Themes Version
Displays the version number of the theme currently in use by the presentation project. If this indicates unknown, then the project does not contain themes, or theme files may be corrupted.
Theme Shown in Designer
Contains a dropdown list of the themes currently in your presentation project. If there are no themes currently in your project, the list will be empty. You can select the theme shown by the designer. Refer to Designer Theme Selection.
Use Browser User-Agent String for Runtime Theme Selection
Enables/disables runtime theme selection. Refer to Adding Validation to Your Web Forms Page.