Creating images for the Web : Adding visible watermarks
 
Adding visible watermarks
You can place a visible watermark consisting of text and/or a graphic on any raster image. Whether you take professional photos or just share photos on public websites, adding a discrete mark to your photos reminds viewers who took the shot. This feature simplifies the task of adding a logo or other graphic, and you can choose from professional effects like embossing to give it a subtle look.
You may find that the watermark graphic looks better when you create it with a transparent background. If so, you’ll need to save the graphic in a file format that supports transparency (such as PspImage, TIF, or PNG). You can use images that do not have a transparent background, but be aware that the watermark will display a rectangle around it, although you can adjust the opacity of the overall graphic.
To add a visible watermark
Edit workspace 
1 Choose Image Watermarking Visible Watermark.
The Visible Watermark dialog box appears.
2 In the Watermark Source group box, click the Browse button. Use the Open dialog box to navigate to the folder containing the graphic you want to use for the watermark.
The graphic appears in the preview area of the Watermark Source group box.
3 In the Placement group box, choose a placement option:
Tile — places the graphic in rows and columns that cover the image
Center — places the graphic in the center of the image
Corner — lets you choose the image corner in which the graphic is placed
4 In the Style group box, adjust the overall appearance of the graphic:
Size — lets you adjust the size of the graphic
Opacity — lets you adjust the graphic’s opacity. Increasing the Opacity setting allows more of the underlying image to be seen through the graphic.
Emboss — applies a raised appearance to the graphic
5 Click OK.