General preferences - Adobe Fireworks

The following options are on the General preferences tab:

Undo Steps sets undo/redo steps to a number between 0 and 1009. This setting applies to both the Edit > Undo command and the History panel. A large number of undos can increase the amount of memory Fireworks requires. You must restart Fireworks for the change in this setting to take effect.

Color Defaults sets the default colors for brush strokes, fills, and highlight paths. The Stroke and Fill options do not automatically change the colors displayed in the color boxes of the Tools panel; they allow you to change the default colors that are specified by the Set Default Stroke/Fill Colors button in the Tools panel.

Interpolation sets one of four different scaling methods that Fireworks uses to interpolate pixels when images are scaled:

Bicubic interpolation gives the sharpest and highest quality most of the time and is the default scaling method.
Bilinear interpolation gives sharper results than Soft interpolation but not as sharp as Bicubic.
Soft interpolation, which was used in Fireworks 1, gives a soft blur and eliminates sharp details. This method is useful when others produce unwanted artifacts.
Nearest Neighbor interpolation results in jagged edges and sharp contrasts with no blurring. The effect is similar to zooming in or out on an image with the Zoom tool.

Workspace: Show Tab Icons is deselected by default. It allows you to display or hide the graphical icons on panel tabs that were visible in previous versions of Fireworks. This option also affects the display of the Mini-Launcher at the bottom of the Document window.

Saving files: Add Preview Icons (Macintosh only) allows you to display or hide thumbnails of Fireworks PNG files on your hard disk. Deselecting this option displays the traditional Fireworks icon used for Fireworks PNG files. This option takes effect after you save the file.