You can use Lycia Theme Designer to modify the settings of the toolbars within your application. You can edit the toolbar settings for all the toolbars within the application or for a specified toolbar.
By default, the window level toolbar is always visible. It can be either the default toolbar or the toolbar created using the theme file. To hide a toolbar of a window, add the toolbar from the Tree view to the Styles view, then add the Visible property to this toolbar and leave the checkbox unchecked:
To hide all the toolbars in within an application, use the tool bar element without the With ID filter.
Lycia supports changes to the scaling of dynamic Toolbar icons.
It is possible to change the default icon height and width using the Icon Height and Icon Width properties as well as the image. For more information, please, refer here.