layers and visibility

[boneychil]

Hi to all! I'm just getting into the Dreamweaver arena. When I first started working with DW I was under the impression that you could put a picture on top of a picture on top of a picture and be able to see all 3 as one.

Now that I've messed around with DW it looks like layers would be what I would need to use.

My Question is:

Does layers allow you to set transparencies to 2 or 3 or more layers. For example if you placed a yellow layer on top of a blue layer would it make the resulting overlap portion green. I have seen something like this in DW/ Modify/Page Properties.

I hope someone understands my ?
and thanks in advance.

This is a great forum. Seems to be a large member base.

 

[viol8ion]

Layers do not have transparency attributes such as you are describing. You can have a layer with an image, and on top of that have a layer with text... however JPGs are not capable of having transpareny borders, and transparent GIFs are not transparent per se. I am not sure how one gif over another would act on layers, since I have never attempted it, but I don't think it will have the outcome that you are looking for.

Also, be forewarned that nesting layers like that will act differently on Netscape 4 than on IE. When in doubt, deny all terms and defnitions.

http://www.wuli.com

 

[bluranj]

Your question deals with 2 topics.

1. Layer positioning.

lets say you have 3 layers each 100 x 100. you can position them at co-rds 10, 10. yes all of them. which layer is then visible? the layer with the highest z-index.

2. Transperency

With CSS you can set the opacity of a layer. But this works only in IE not in netscape, no not even in nescape 6.0+
Transperency of a layer can be set in the CSS panel. Extensions is the tab where you will see a drop down menu for filter. The first selection is for Alpha.
More info is available at

http://msdn.microsoft.com/workshop/samples/author/dhtml/DXTidemo/DXTidemo.htm

So given the above 2 senarios. If you have 50% opacity for a red , blue and green layer. and all these layers are placed one above another then you should get BLACK as output. I haven't tried it. If you do, please let me know the results.