Adobe Acrobat Pro - Batch processing

How to access the batch processing function in Adobe Acrobat Pro for manipulating PDF documents?
Sometimes, you may need to convert files into PDF files with a security password preventing from further PDF modification or whatever. This typical example may highlight one of the most powerfull (and hidden function) of Adobe Acrobat Pro.
To display the batch processing menu

1. go to the Advanced menu from the menu bar and
2. select the Document processing menu item and
3. then Batch processing submenu.

From the Batch Sequences dialog you can select a pre-existing sequence or define your own sequence which will be saved and then display in the list of defined sequences which can be run.
If you click on the New Sequence button you will be first displayed a dialog requesting to give a name for this new sequence and then you will have access to the commands which can be implemented in the sequence.