STEP 1
Run PDF Super Toolkit, click on Add Watermark to PDFs.
STEP 2
Click on Add button at the top of the window to choose PDF files from your machine. When selecting files, multiple files can be selected using CTRL key or SHIFT key.
STEP 3
It gives 2 options to add text watermark or add image watermark, so use according to need.
STEP 4
It gives 2 options to store each output PDF file to the same folder as the original file or store all output PDF files to a custom folder, so use according to need.
STEP 5
Click on Process button to add watermark to added PDF files. The results of the conversion are displayed in the Status column in the grid.