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Creating a bitmap mask

You can create a bitmap mask by selecting an area of the document through which the bottom objects will show and finish creating the mask using either the Layers panel or the Mask commands on the Modify menu.

Using the Tool Options panel, you can create a feathered edge to soften the mask's outline, or use a hard or anti-aliased edge for a sharp mask outline. You can also set the canvas color to determine whether the masked-out parts appear as transparent (the default), black, white, or another color.

To create a bitmap mask:

1 Open or create a document in Fireworks. You can use a document that contains vector objects, bitmap objects, or a combination of both.
2 Optionally, choose Modify > Canvas Color, choose a color from the Canvas Color dialog box, and click OK.
3 Double-click the Marquee, Lasso, or Magic Wand tool to open the Tool Options panel. The panel shows tool-specific options.


 

4 Set the Edge tool settings as desired:
Choose Hard to create a marquee selection with a sharp edge.
Choose Anti-alias to prevent jagged edges in the marquee selection.
Choose Feather to soften the edge of the pixel selection.
5 For Marquee tool selections only, choose a Style:
Choose Normal to create a marquee in which the height and width are independent.
Choose Fixed Ratio to constrain the height and width to defined ratios.
Choose Fixed Size to constrain the height and width to a set dimension.
6 Draw a selection marquee around the area of the document that you want to show through the mask.
7 Add the mask by doing one of the following:
Click the Add Mask button on the Layers panel. If the Layers panel is not already open, choose Window/Layers to open it.


 

Choose Modify > Mask > Reveal Selection to show only the selected area.
Choose Modify > Mask > Hide Selection to hide the selected area and show the rest of the document.
A yellow striped border appears around the canvas to indicate that a mask is applied and the canvas color hides the masked part of the object.

This example uses the Reveal Selection command.
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