/// <summary>
/// Gets or sets the value indicating whether the display is visible.
/// </summary>
- /// <value></value>
+ /// <value>true if the display is visible; otherwise false.</value>
/// <exception cref="InvalidOperationException">
/// The display is not assigned.\n
/// -or-\n
/// <summary>
/// Sets the roi(region of interest).
/// </summary>
+ /// <param name="roi">The region.</param>
/// <remarks>
/// To set roi, <see cref="Mode"/> must be set to <see cref="PlayerDisplayMode.Roi"/> first.
/// </remarks>