When you double-click a bitmap image, Fireworks changes to image edit mode. You can see that Fireworks is in image edit mode by the striped border that appears around the entire document. When the border is visible, you can paint or edit pixels anywhere within the document.
A striped border outlines the canvas in image edit mode.
Image edit mode is where you edit pixels. Drawing and editing in image edit mode is irreversible except for undoing commands using Edit > Undo or the History panel. You cannot draw path objects in image edit mode.
Bitmap images such as photographs do not contain paths that let you reshape the image by moving a point on the path. Each pixel is what you see. For more information on editing objects with paths and points, see Reshaping paths by editing points.
A vector object with a path and points, and a bitmap image composed entirely of pixels.