Every part of the WinForms viewer — toolbar, side panels, scrollbars — can be shown or hidden at run time through the StiViewerControl properties.

Toggle viewer elements. Each option maps to a property; assigning it updates the preview immediately:
private void cbToolbar_CheckedChanged(object sender, EventArgs e)
{
    PreviewControl.ShowToolbar = cbToolbar.Checked;
}

private void cbBookmarks_CheckedChanged(object sender, EventArgs e)
{
    PreviewControl.ShowBookmarksPanel = cbBookmarks.Checked;
}

private void cbThumbs_CheckedChanged(object sender, EventArgs e)
{
    PreviewControl.ShowThumbsPanel = cbThumbs.Checked;
}

How it works. The viewer control exposes a property for every part of its chrome, letting you trim it down to just what your application needs.
In the screenshot below you can see the result of the sample code:

Customizing the Viewer

Hi. Need any help?