Select Watermark under the Design tab.
A pre-configured watermark like DRAUGHT, CONFIDENTIAL, or DO NOT COPY are good choices.
Use the following steps to add a logo or image: Select Watermark > Custom Watermark > Picture Watermark > Select Picture. A custom text watermark may be made using the same options.

On the Design tab, select Watermark. Select Custom Watermark, and then choose Picture Watermark.

To Add a watermark
Select Watermark from the Design menu.
Select a pre-defined watermark, such as DRAUGHT, CONFIDENTIAL, or DO NOT COPY.
Select Watermark > Custom Watermark > Picture Watermark > Select Picture to place a logo or picture. A custom text watermark can be created from the same option.