|Administering Report Server|
A watermark is text that appears in the background of a report. You can specify a string to use as a watermark for all reports in the db.properties file. For example, you may add a watermark that reads "CONFIDENTIAL" to reports.
Use the following steps to specify watermark text for all reports:
Watermark = WatermarkText
where WatermarkText is a string. Do not enclose the value in quotes. Keep the watermark text short (no more than 50 characters); otherwise, the text may be truncated.