5.21.1 Top new questions this week

5.21.1.1 Syntax and semantics of XDV commands (XeTeX)
5.21.1.2 Improve appearance of the table in Latex
5.21.1.3 Densest sphere packing
5.21.1.4 Draw a symmetric alien head
5.21.1.5 Matrix with effects
5.21.1.6 Drawing people along with x and y axis
5.21.1.7 Bent arrow under a node
5.21.1.1 Syntax and semantics of XDV commands (XeTeX)

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=496061

Donald E. Knuth has included a complete list of the syntax and semantics of DVI commands (opcode, symbolic name, number of parameters, meaning) in Computers & Typesetting Vol. E, A^\[Section]585, pp.  ... 
[xetex] [dvi] [opcodes]
 
asked by yannis https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=18645 12 votes
answered by ShreevatsaR https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=48 7 votes
5.21.1.2 Improve appearance of the table in Latex

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=496161

I created a table in Latex to show some comparison data about some frameworks. 
How can I improve its appearance? 
\begin{table}[ht] 
\rowcolors{1}{gray!25}{white} 
\centering 
... 
[tables] [tabularx] [itemize]
 
asked by Kathrine Hanson https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=162746 11 votes
answered by Zarko https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=18189 15 votes
5.21.1.3 Densest sphere packing

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=496046

I would like to represent the densest sphere packing in dimension 3 
as the following picture, for a beamer presentation. 
Is Tikz the way to go for it? It is not a real 3D drawing since I only want  ... 
[tikz-pgf] [3d]
 
asked by Wokwok https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=191129 11 votes
answered by Dynamite https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=190902 15 votes
5.21.1.4 Draw a symmetric alien head

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=496042

I am trying to draw the following "symmetrical alien head": 
Using the mirror code from Can we mirror a part in tikz? I was able to produce the following result 
While the result looks good I am  ... 
[tikz-pgf] [transformation]
 
asked by N3buchadnezzar https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=8306 10 votes
answered by marmot https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=121799 12 votes
5.21.1.5 Matrix with effects

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=496096

Sending out the bat signal eth\237\246\207. Could you please help me to get this piece of art? I have  no idea about how to obtain it. 
In the meantime Ia^\200\231m working on a MWE: 
... 
[tikz-pgf]
 
asked by naveganTeX https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=185467 8 votes
answered by marmot https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=121799 11 votes
5.21.1.6 Drawing people along with x and y axis

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=496500

I need to draw whata^\200\231s on this picture: 
I would like to add tikzpeople instead of the simple drawings that you can see in the original picture. 
\documentclass[tikz,border=2mm]{standalone} 
... 
[tikz-pgf]
                                                                                  

                                                                                  
 
asked by naveganTeX https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=185467 7 votes
answered by marmot https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=121799 5 votes
5.21.1.7 Bent arrow under a node

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=495944

Here is my problem. 
I am trying to get a bent arrow "go" under the CxExF node by breaking the long arrow into two parts. However, I would like the two parts to follow the same "path" as the long  ... 
[tikz-cd]
 
asked by geguze https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=151391 7 votes
answered by M. Al Jumaily https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=167081 10 votes