I am not sure there exists any one person who can grant you permission to use
screen shots, but someone with more clue than I have may be able to clear this
up with you. Regarding packages, copyright rests with the package authors, so
use the maintainer() function to find out who you need to ask
Dear Sir/Madam,
We are in the process of developing a textbook on R and are writing to
request your permission to include certain screenshots relating to
installation of the package in our book to be published tentatively in May
2017. The description of our book is as follows*:*
*Title*: Statis
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