Add pages to PDF.

Add pages to PDF.
When to use it?
If we intend to merge two or more PDF document in a single PDF.
What part of PDF is affected by it?
The PDF remains in the same form, only the page number changes.
What to watch for?
We intend to insert another PDF before or after the actual page. PDF documents having different sizes and color spaces can also be merged.
How to use it?
Find the page in front of which or after which you intend to insert other page or pages.
For example insert PDF having two pages in front of page 2:
Inserting pages to any location in the PDF.
Add 2 pages.
Modification of PDF pages