Crop a document
Cropping deletes unwanted portions of a document. The canvas
is resized to fit an area that you define.
By default, cropping deletes objects that extend beyond the canvas
boundaries. You can retain objects outside the canvas by changing
a preference before cropping.
Select the Crop tool
from
the Tools panel or select Edit > Crop Document.
Drag a bounding box on the canvas. Adjust the crop handles
until the bounding box surrounds the area that you want to keep.
Double-click inside the bounding box or press Enter to crop
the document.
Fireworks resizes the canvas to the area you
define and deletes objects beyond the edges of the canvas.

To retain objects outside the canvas, deselect
Delete Objects When Cropping on the Edit tab of the Preferences
dialog box before cropping.