I didn't understand very well this part, since English is not my native language.
LATEXMK *vimtex-compiler-latexmk*
As stated, one may customize the `latexmk` options through
|g:vimtex_compiler_latexmk|. However, one may also configure `latexmk`
explicitly through a global `~/.latexmkrc` file, or a project specific
`.latexmkrc` file. It is important to know that command line arguments have
priority, so one may want to use custom options if one wants to specify
particular things in a configuration file.
I do have a latexmkrc
file with my settings. In .vimrc
I have only
let g:vimtex_view_method = 'zathura'
let g:vimtex_compiler_method = 'latexmk'
So every time I use <leader>ll
will use my config file, or some other default config for latexmk
hidden in the plugin's code?