PICASA, a picture management software, can be implemented simply and quickly if only plain text watermark is added.

1, first open PICASA and then open the image to be watermarked in PICASA. Select the pictures (single or multiple) to be watermarked.

2. The menu bar-File-Export-Export dialog box appears. The dialog box has an input field for adding a watermark, in which you can enter the text content of the watermark. As shown in the figure below:

3. Click "OK" to start exporting pictures. All exported pictures will be watermarked.