'Declaration

<BrowsableAttribute(False)>
Public Overridable ReadOnly Property IsVisibleWithoutImage As Boolean

[Browsable(False)]
public virtual bool IsVisibleWithoutImage { get; }

[Browsable(False)]
public: __property virtual bool get_IsVisibleWithoutImage();

[Browsable(False)]
public:
virtual property bool IsVisibleWithoutImage {
   bool get();
}

true - this visual tool will be always visible in image viewer;
false - this visual tool will be visible in image viewer only if image is painted in image viewer.
Default value is false.