Save the content of the display into an image file with the current resolution of the display. If the filename attribute is not set, the display will show a Save File Dialog to the user so she can specify the name and location of the file to save the image to.

Save the content of the scene into an image file with the given width and height as the resolution of the resulting image. If the filename attribute is not set, the display will show a Save File Dialog to the user so she can specify the name and location of the file to save the image to.