6.15.2 Greatest hits from previous weeks

6.15.2.1 Nice scientific pictures show off
6.15.2.2 "Correct" way to bold/italicize text?
6.15.2.3 Dictionary for TeXstudio: 'No dictionary Available'
6.15.2.4 Tabular: title above and caption below?
6.15.2.5 How to change color for a block of texts?
6.15.2.6 Problem with compiling BibTex: "no \citation commands" error
6.15.2.7 Keeping tables/figures close to where they are mentioned
6.15.2.1 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 511 votes
answered by Charles Staats https://tex.stackexchange.com/landing/r/digest?cta=user&id=484 304 votes
6.15.2.2 "Correct" way to bold/italicize text?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=41681

Is either of these considered better/more readable/more "proper"/more conventional than the other for making text bold? If so, what is the reason? 
I like my text \textbf{bold} 
versus: 
I like my  ... 
[best-practices] [bold] [italic]
 
asked by user541686 https://tex.stackexchange.com/landing/r/digest?cta=user&id=2694 383 votes
answered by Todd Lehman https://tex.stackexchange.com/landing/r/digest?cta=user&id=8499 368 votes
6.15.2.3 Dictionary for TeXstudio: 'No dictionary Available'

https://tex.stackexchange.com/landing/r/digest?cta=question&id=87650

I have trouble spell checking my document in TeXstudio. When I press spellcheck, I get the error No dictionary Available. Am I supposed to install a dictionary separately? How? Any suggestion? 
[texstudio] [spelling] [dictionaries]
 
asked by N Nik https://tex.stackexchange.com/landing/r/digest?cta=user&id=21429 84 votes
answered by Peter Jansson https://tex.stackexchange.com/landing/r/digest?cta=user&id=19384 114 votes
6.15.2.4 Tabular: title above and caption below?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=15282

I have a table that I would like to put the Title above and a caption below. Intuitively (though I know how troublesome intuition can be in something like LaTeX), I should be able to do as below: 
... 
[tables] [captions]
 
asked by Alec https://tex.stackexchange.com/landing/r/digest?cta=user&id=2457 68 votes
answered by Alan Munn https://tex.stackexchange.com/landing/r/digest?cta=user&id=2693 42 votes
6.15.2.5 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 244 votes
answered by Martin Scharrer https://tex.stackexchange.com/landing/r/digest?cta=user&id=2975 286 votes
6.15.2.6 Problem with compiling BibTex: "no \citation commands" error

https://tex.stackexchange.com/landing/r/digest?cta=question&id=18045

I'm really new to BibTex, I just wonder what is going wrong when I have this kind of error when I try to compile my bibliography file. 
I found no \citation commands---while reading file  ... 
[bibliographies] [bibtex]
 
asked by zfm https://tex.stackexchange.com/landing/r/digest?cta=user&id=3559 75 votes
answered by Spike https://tex.stackexchange.com/landing/r/digest?cta=user&id=5150 28 votes
6.15.2.7 Keeping tables/figures close to where they are mentioned

https://tex.stackexchange.com/landing/r/digest?cta=question&id=2275

Is there any package or a method to force LaTeX to keep floating environments like table and figure closer to where they are declared? 
[floats] [positioning]
                                                                                  

                                                                                  
 
asked by artimess https://tex.stackexchange.com/landing/r/digest?cta=user&id=833 335 votes
answered by Stefan Kottwitz https://tex.stackexchange.com/landing/r/digest?cta=user&id=213 343 votes