Import as Layer Overlay
The Import as Layer Overlay tool uses an existing file to overlay documents:
Figure 1. Insert Empty Pages Tool Actions Sequence
The Insert As Layer Overlay tool uses four tool actions:
1. 
Choose Input Files - the tool prompts for source documents.
2. 
Import as Layer Overlay - the document pages are overlaid with pages from the source file.
3. 
Save Documents - the updated documents are saved.
4. 
Show Files - the new documents are displayed in their destination folder.
Click actions to view customizable parameters. Additionally, please note that the Clone Tool feature can be used to clone this tool and then add/remove actions from the Tool Actions Sequence.
Information about the Batch Processing Mode and Multi-Threaded Processing check boxes is available here.