7.68.2 Greatest hits from previous weeks

7.68.2.1 Nice scientific pictures show off
7.68.2.2 How to change color for a block of texts?
7.68.2.3 Table with multiple lines in some cells
7.68.2.4 Underscores in words (text)
7.68.2.5 How to install "vanilla" TeXLive on Debian or Ubuntu?
7.68.2.6 How do I align an image to centre?
7.68.2.7 Show equation number only once in align environment
7.68.2.1 Nice scientific pictures show off

https://tex.stackexchange.com/landing/r/digest?cta=question&id=158668

Task 
Show off your best scientific illustration ! 
The main purpose of this question is to share beautiful scientific pictures, preferably with an educational aspect. 
Content 
Your post must ... 
[diagrams] [3d] [technical-drawing] [fun] [big-list]
 
asked by Thomas https://tex.stackexchange.com/landing/r/digest?cta=user&id=42660 545 votes
answered by Charles Staats https://tex.stackexchange.com/landing/r/digest?cta=user&id=484 326 votes
7.68.2.2 How to change color for a block of texts?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=17104

I am editing a LaTeX paper with Emacs. Sometimes I want to make a block of texts less obvious (or less important to see). Instead of totally hiding them, they should still be there. Is there an easy ... 
[color]
 
asked by SoftTimur https://tex.stackexchange.com/landing/r/digest?cta=user&id=5110 295 votes
answered by Martin Scharrer https://tex.stackexchange.com/landing/r/digest?cta=user&id=2975 354 votes
7.68.2.3 Table with multiple lines in some cells

https://tex.stackexchange.com/landing/r/digest?cta=question&id=40561

What is the easiest way to have 2 lines in some of the cells in a table? 
The only way I can think right now is to actually have 2 separate rows (without the line in the middle) and use \multirow on ... 
[tables]
 
asked by Grzenio https://tex.stackexchange.com/landing/r/digest?cta=user&id=3329 175 votes
answered by Werner https://tex.stackexchange.com/landing/r/digest?cta=user&id=5764 164 votes
7.68.2.4 Underscores in words (text)

https://tex.stackexchange.com/landing/r/digest?cta=question&id=48632

How can I produce the text Word_one_two in LaTeX? 
I tried: 
Samp\_Dist\_Corr 
But, it doesn't quite look right. Also, I want it in the typewriter font, so actually, I'm doing: 
\texttt{Samp\_Dist\... 
[characters] [typewriter]
 
asked by Flux Capacitor https://tex.stackexchange.com/landing/r/digest?cta=user&id=11728 209 votes
answered by David Carlisle https://tex.stackexchange.com/landing/r/digest?cta=user&id=1090 181 votes
7.68.2.5 How to install "vanilla" TeXLive on Debian or Ubuntu?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=1092

Debian and Ubuntu have very good texlive packaging. But I'd like to use tlmgr to have a more fine-grained control about upgrades and which packages I want to be installed. 
So how do I install "... 
[packages] [texlive] [installing] [linux] [tlmgr]
 
asked by Dima https://tex.stackexchange.com/landing/r/digest?cta=user&id=137 313 votes
7.68.2.6 How do I align an image to centre?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=53862

How do I align an image to centre? 
In a beamer presentation I have a 2-3 items on a slide followed by an image. 
The image is not wide enough to cover whole slide, so it leaves around 30% space from ... 
[beamer] [horizontal-alignment]
 
asked by epsilon8 https://tex.stackexchange.com/landing/r/digest?cta=user&id=12860 68 votes
7.68.2.7 Show equation number only once in align environment

https://tex.stackexchange.com/landing/r/digest?cta=question&id=17528

I want the equation number to be shown only at the last line, or better, somewhere in the middle of all. So instead of (1), (2), ... only (1). 
I use \begin{align} ... \end{align} 
[equations] [align]
 
asked by Theta30 https://tex.stackexchange.com/landing/r/digest?cta=user&id=5350 232 votes