9.29.3 Can you answer these questions?

9.29.3.1 Tikz 3D Plots not working

https://tex.stackexchange.com/landing/r/digest?cta=question&id=684438

I wanted to get into some 3D plotting with Tikz 3D. I just wanted to learn the basics first and I copied an example to see if everything worked correctly. But then this happend: 
I know it's probably ... 
[tikz-pgf] [tikz-3dplot]
 

asked by Hanking https://tex.stackexchange.com/landing/r/digest?cta=user&id=278569 Score of 1

answered by Rmano https://tex.stackexchange.com/landing/r/digest?cta=user&id=38080 Score of 0

9.29.3.2 TexStudio highlighting expl3 commands as error?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=684328

I am using TexStudio. When using expl3-commands the syntax highlighting does not work for the whole command and instead everything with an underscore is marked as an error: 
I had found Expl3 syntax ... 
[texstudio] [expl3]
 

asked by mrCarnivore https://tex.stackexchange.com/landing/r/digest?cta=user&id=281557 Score of 1

9.29.3.3 How to include commutative tikzcd diagrams in a poster made with fancytikzposter?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=684249

I am using the tikzposter package to create a small presentation on category theory, it is inevitable that the use of commutative diagrams must appear. In a classical document, I know how to do it and ... 
[tikz-pgf] [tikz-cd] [tikzposter]
 

asked by Foxy https://tex.stackexchange.com/landing/r/digest?cta=user&id=295983 Score of 1