6.55.3 Can you answer these questions?

6.55.3.1 How to fill a Tikz path, for which anchors are not defined by coordinates but by nodes

https://tex.stackexchange.com/landing/r/digest?cta=question&id=564173

I am trying to add a path in a tikzpicture. 
The area surrounded by the path shall be colored, i.e., filled in a color. 
I would like to use nodes as anchors for the path, rather than x, y coordinates. 
... 
[fill] [tikz-path]
 

asked by user219408 https://tex.stackexchange.com/landing/r/digest?cta=user&id=219408 1 vote

6.55.3.2 Multibib package not working with elsarticle class file on Overleaf

https://tex.stackexchange.com/landing/r/digest?cta=question&id=564338

The following is a minimum working example on Overleaf. The below code works as expected, and gives the correct output: 
\documentclass[8pt]{article} 
%\documentclass[final,5p,times,twocolumn,number,... 
[overleaf] [elsarticle] [multibib]
 

asked by ap123 https://tex.stackexchange.com/landing/r/digest?cta=user&id=225488 1 vote

6.55.3.3 LuaTeX: Devanagari glyph order is reversed in tex's internal nodelist, how to recover the correct order while traversing glyph nodes?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=564097

Note: The problem discussed in this question might affect not just Devanagari, but also other scripts that have character (logical/typed) & glyph (presentational/typeset) order reversed/reordered ... 
[luatex] [fontspec] [unicode] [luahbtex]
 

asked by reportaman https://tex.stackexchange.com/landing/r/digest?cta=user&id=192717 1 vote