Use left group of controls to set the watermark text, font, color and transparency settings.
Combo box contains list special variables which allow to create dynamic watermark text
Use Position controls to specify the position of watermark at the image.
The Tile checkbox allows to the repeat watermark many and fill the image.
Click the Watermark Image button to select the image for the watermark. You can select images which are contain transparent parts (like png and gifs files). Other controls are the same as for text watermarks.