Yes, you can use the addWatermarkFromFile method to do it, or the built-in
Add Watermark command (although that might not work with your page
If you have Acrobat Pro you can use an Action and apply it to multiple
Is this possible? The watermark tool has the same page functions as the actionlist so it doesn't work for what I need.
Yes, it's possible with JS. You need to use this method: addWatermarkFromFile
As the nStart parameter use this code: this.numPages-2