Changing the Image Editor's Layout Size and Color

To change the editor window's background color, select the desired color from the color palette then use the "Layout/Layout Color" option.

If you want to increase the size of the editing area beyond what is defined by the boundaries of the world coordinate system, use the "Layout/Layout Size" option. A dialog will be displayed allowing you to increase the number of "screens" thereby adding space to the right and bottom sides of the editing area. This new space can be "scrolled" to using the right and bottom scroll bars attached to the editor window.