7.57.3 Can you answer these questions?

7.57.3.1 How to define dashed lines with arrows in the tikz package?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=615493

Good afternoon, 
I would like to indicate the directions as I have done for the solid lines but for the dashed lines. How could I do this? I attach an image of how I would like it to look like. 
Thank ... 
[tikz-pgf] [graphs]
 

asked by PacoteMicasa https://tex.stackexchange.com/landing/r/digest?cta=user&id=252116 1 vote

7.57.3.2 Tikzset modifying pics without cause

https://tex.stackexchange.com/landing/r/digest?cta=question&id=615230

For some reason, tikzset seems to draw pics differently the first and second time. In the following example, I expect the two neural networks I draw to be identical, with one directly right of the ... 
[tikz-pgf] [tikzset]
 

asked by Steven Morad https://tex.stackexchange.com/landing/r/digest?cta=user&id=251969 1 vote

7.57.3.3 Add a symbol before section number in Table of Contents

https://tex.stackexchange.com/landing/r/digest?cta=question&id=615272

I would like to highlight some selected sections in the Table of Contents with a symbol before the section number, something like: 
! 1.1 First section, 
and I would like the section numbers to be still ... 
[table-of-contents]
 

asked by Carlo https://tex.stackexchange.com/landing/r/digest?cta=user&id=251979 1 vote