3.33.2 Greatest hits from previous weeks

Greatest hits from previous weeks:

3.33.2.1 What are all the font styles I can use in math mode?

https://tex.stackexchange.com/questions/58098/what-are-all-the-font-styles-i-can-use-in-math-mode

As can be seen in above picture, there are lots of fonts or font styles that can be used in math mode. 
What are all the fonts or font styles I can use in math mode, and which packages are required  ...
 

- asked by doncherry (260 votes), answered by Christian (338 votes)

3.33.2.2 How to add an extra level of sections with headings below \subsubsection

https://tex.stackexchange.com/questions/60209/how-to-add-an-extra-level-of-sections-with-headings-below-subsubsection

I have a document which requires many levels of sectioning. I have sections, subsections and subsubsections, but require one more level below that. I can't change the sections to be parts and move  ...
 

- asked by robintw (165 votes), answered by Gonzalo Medina (141 votes)