EO.Wpf SplitView supports advanced splitter mode. To use this feature, set SplitView.SplitterMode to Advanced. In advanced splitter mode, user can select/collapse views and switch SplitView orientation. The following image demonstrates various features of this mode:

A SplitView in advanced mode can be collapsed to all four sides. When a SplitView is collapsed, it displays a tabbed interface that allows user to select either view. The following XAML demonstrates this feature by:

• Setting SplitterMode to Advanced;
• Setting Orientation to Vertical (View1 and View2 are arranged vertically, splitter bar is horizontal);
• Setting CollapseState set to BottomRight;
• Setting View1Title and View2Title to customize the title text for the tab buttons;

<Window x:Class="Test.Window1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:eo="http://schemas.essentialobjects.com/wpf/" 
        Title="Window1" 
        Height="300" 
        Width="500">
    <eo:SplitView SplitterMode="Advanced" 
        Orientation="Vertical" CollapseState="BottomRight"
        View1Title="Design" View2Title="Code">
        <eo:SplitView.View1>
            <TextBlock>View1</TextBlock>
        </eo:SplitView.View1>
        <eo:SplitView.View2>
            <TextBlock>View2</TextBlock>
        </eo:SplitView.View2>
    </eo:SplitView>
</Window>

The above code produces the following result:

When a SplitView is in collapsed mode, user can either drag the splitter bar or click the "collapse" button on the splitter bar to switch back to split mode.