You can use custom images to show as a preview image for your tour in the menu area.
The preview image has to be square, optimal size: 1024×1024 pixels, filename: tourpreview.jpg
The file has to be placed in the same folder as the tour xml file (default: pano.xml). Note that the image will be cropped, 25% from the top and 25% from the bottom.
To let VR Tourviewer know that there’s a preview image available you have to add a User Data Tag to one of the panoramas in the tour called ‘tourpreview’.