Define level.

 

 

Reference- Table of contents- Custome table of content

Mouse- Wheel – The following number of lines per time.

 

Acrobate document processing

Acrobat-document-extract pages
Acrobat-file-combine file-merge files into a single PDF

Maxrecentdocs allow in windows,

https://www.howtogeek.com/howto/windows-vista/change-the-number-of-recent-items-shown-on-the-vista-start-menu/

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It will be very annoying if you choose wrong in
layout-page setup-layout-alignment- bottom