So, I am writing a RMD file and and I want my subsubsections to be fronted by letters and not numerics. I can do this by hand but I want to use number_sections: true for conviniance. Hence, I tried rewritting the subsubsection command with:


I imported the rewritten funciton it in my RMD file. However, this is without success. What am I doing wrong do I need to specify further arguments in my function?

Any help is warmly welcome!

  • 1
    Welcome to TeX SX! This may depend on the document class, on packages you load. Please post a minimal example illustrating the problem
    – Bernard
    Mar 6, 2020 at 13:00
  • 4
    – user194703
    Mar 6, 2020 at 13:00

1 Answer 1


Schrödinger's cat's \renewcommand{\thesubsubsection}{\Alph{subsubsection}} did the trick for me.


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