i am new to dreamweaver and new to website creating , this is an easy question but i just cant work it out...
i have a background picture then i have a table with text, i want to change the background from a solid color to a near transparent look so the background image comes through a little bit.
i guess i click bg at the bottom of the screen. when i go to this the third bar seems like it changes the transparency (which is what I want) however i cant seem to get the change to stick
i change the state off the third slider that will change the 'alpha' but whenever i go back to this screen the slider is all the way to the top again
You would need to use an rgba color, rather than a hex color to get a transparency added. The problem with doing that is old browsers can't see rgba colors at all.
In your situation, it would be best to create a partially transparent PNG-24 in Photoshop and then use that .png as the background image in the css for your table.
That will give you the best cross-browser compatibility.
Tables are not typically used for layouts anymore (except for e-mails). That's the old school approach. Nowadays, we use CSS layouts like the start-up pages that come with DW.
Go to File > New > Blank page > HTML. Pick a layout from 3rd panel & hit Create.
Who is your target audience? Pre-IE9 users on older equipment or modern browsers/mobile/tablet users? Once you establish who your target audience is, that's who you need to build your sites for.
I haven't used PNG transparent images for backgrounds in quite a while. I don't feel I need to because all modern browsers and mobile devices can easily support RGBA colors or CSS gradients. See links below for examples.
RGBA Color Picker
CSS Gradient Generator