Parameterized Report: Common parameters for Rmarkdown site or similar platform



Is there some way to specify common parameters for the Rmarkdown site which uses multiple r-markdown to render a single site. This can be on a regular Rmarkdown site or bookdown or similar site rendering system. It will help the user to specify the parameters in one place, otherwise, it will be tedious to define the same parameter in each Rmarkdown and change on each of them. I tried to define in _site.yml fine but it didn't work.