Open the File Settings menu by following:

||Virtual Tour Tool Ribbon|| > Edit > Current file > Settings

Title – Displays the name of the currently selected file. 

Description –  Displays a description of the file. 

Panorama mode – When enabled, panorama images are displayed in panorama view. When switched off, the panorama image appears flat. Equirectangular/spherical panoramas, cube and stereo panoramas (left-right & top-down types) are supported in this mode.

Automatic – Calculates the orientation automatically to simulate movement in the correct direction based on the existing hotspots. (default) 
Original – Preserves the original default orientation as the image is rendered.
Custom – Allows setting a custom starting orientation for panoramas.

Premultiplied alpha – Marks the uploaded image as an image with premultiplied alpha and visualizes it as such.