(This section of the documentation only describes the object Image, not how to add those to a specific dashboard. If that's what you're looking for, have a look at this section instead. )
The purpose of the Image object is to display an Image with an optional header. The header can be configured with a specific font, font size, color and background color, when defining the object. Apart from the location setting's of the object, only the splitter setting's is adjustable.You can see the setting's window's below.