how to center objects on layer on dreamweaver

There's a little icon that looks like a sheet of paper at the bottom of the Layers palette. Click it.
If you want a new transparent layer UNDER the current one Ctrl-click it. Answered Nov, 30 2010

Here's one of my favorites—a quick way to use one layer to mask the content of another layer. Say you have a butterfly on a transparent layer and you want to add some texture to the butterfly. Scan a piece of textured fabric and drag the fabric image onto its own layer above the butterfly layer.
Now you want to mask the fabric so it's the same shape as the butterfly. This is a little counterintuitive, so listen up: In the Layers palette, select the fabric layer. Leave the fabric layer active while you drag the butterfly layer to the Add Layer Mask icon at the bottom of the Layers palette. A layer mask in shape of the butterfly is automatically added to the fabric layer, limiting its effect to that object. Set the fabric layer to a semi-transparent blending mode like Color, and you're done. Answered Dec, 24 2010

1. Launch Dreamweaver and open the page with the image which you want to align with other page objects.
2. Click Window - Properties to open the Properties panel.
3. Select the image and set the Align property on the Properties panel. You can choose Default, Top, Middle, Bottom, Left or Right to see if the image is aligned with the object as you need. You can also choose additional alignment option, such as Baseline, TextTop, Absolute Middle or Absolute Bottom.
4. If you want to specify the alignment of the image with other page objects, you should use CSS. Select the image and right click it. Then click CSS Styes - New to create a new CSS rule.
5. The New CSS Rule window appears. Choose Class(can apply to any tag) from the Selector Type list and type the class name in the Name box.
6. Click OK to close the New CSS Rule window.
7. The CSS Rule Definition window appears. Select Block from theCaregory list.
8. Select Box from the Caregory list and set the property in Float box. If you choose left or right, you can set which side the image is aligned with other objects on, such as text, AP Divs, tables and so on. If you choose none, other objects will wrap around the image.
9. Right-click the tag of the image from the tag selector. Then click Set Class - rig to apply the CSS class, which you created in step 5.
10. Right-click the tag of other page object from the tag selector which you want to align image with. Then click Set Class - rig to apply the CSS class.
11. Now you've aligned the image with other page objects in Dreamweaver successfully.
read more:http://Now you've aligned the image with other page objects in Dreamweaver successfully. Answered Mar, 11 2011