Making a Fireworks png semi-transparent for the web


Using Fireworks CS5 - windows

I need to create a small background png that will be semi transparent for a background color in a drop down menu.

Here's what I have done so far.

I created a canvas 20px by 20px.

I selected transparent as a background

I created a rectangle and filled it with a color.

Then from properties I selected 70 percent transparency for the rectangle, and left Normal in the dropdown.

During the export via Image Preview I selected PNG 8 with index transparency.

However, when  I use the image as the background in a menu it is not transparent.

It could be a problem with my css, but first I want to rule out that I made a mistake creating the transparent image.

Are the steps I did correct? For example, is an index transparency what I want?  OR an alpha transparency.  I assume the PNG8 is correct?   Should I have selected something other than "Normal" from the dropdown in the properties panel?


Rowby GorenAsked:
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David BruggeCommented:
There is a difference between PNG-8 and PNG-24.

PNG-8 is very similar to tiff format. It allows just one shade to be set to transparent, whereas PNG-24 allows a full range of transparency.

This means that you can have regions of 100% transparency with a PNG-8, but not shades or tints.

Try saving as a PNG-24 and everything should work.

Indexed means that one shade and one shade only is transparent, alpha means that a whole range of 256 shades can be transparent.

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Rowby GorenAuthor Commented:
Thanks D_Brugge

I am on the road but will test this later.

Appreciate your clarification.

Rowby GorenAuthor Commented:
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