8.85.3 Can you answer these questions?

8.85.3.1 Enlarging a Very Small Image Clearly

https://tex.stackexchange.com/landing/r/digest?cta=question&id=669762

I would like to (clearly) enlarge a very small image. 
However, when I use a typical approach by adjusting the scaling factor, I get a fuzzy image. 
For example, consider 
\documentclass{book} 
\... 
[graphics] [includegraphics] [scale]
 

asked by mlchristians https://tex.stackexchange.com/landing/r/digest?cta=user&id=192836 Score of 1

8.85.3.2 How to change the text of the running title?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=669503

I would like to change the text (not the style) of the running header for my supplementary section. 
In the following MWE, the line marked "INVALID" is the functionality I'm hoping to find. 
... 
[header-footer]
 

asked by Hermitian https://tex.stackexchange.com/landing/r/digest?cta=user&id=282166 Score of 1

answered by Simon Dispa https://tex.stackexchange.com/landing/r/digest?cta=user&id=161015 Score of 0

8.85.3.3 How to remove space

https://tex.stackexchange.com/landing/r/digest?cta=question&id=669480

how i 
remove space between rows 
alignment the number with text 
how to fit the table to correct paper size and become two long table rather than three table in three pages 
\documentclass{article} 
\... 
[rotating]
 

asked by RMAB https://tex.stackexchange.com/landing/r/digest?cta=user&id=287196 Score of 1

answered by Zarko https://tex.stackexchange.com/landing/r/digest?cta=user&id=18189 Score of 0