Magic wand

The setting of the tolerance value impacts how many similar colors are selected. The higher the number the more unlike colors are selected.

A selection with tolerance 0 (zero) would result in only adjacent pixels of the exact same color to be selected.

In this example I increased the tolerance to 125 and selected in the same area I selected before. You can see that the result is quite different.

You can clearly see that a larger area of pixels was selected. The ability to select areas of pixels has a lot to do with the background on which the object you want to select is located.

High contrast between the desired object and the background is desirable since it allows Fireworks to do a better job in selecting the area.