Please see https://merck.github.io/r2rtf/articles/index.html for the full documentation. Here is only a minimal example:
head(tbl) %>% rtf_body() %>% # Step 1 Add table attributes rtf_encode() %>% # Step 2 Convert attributes to RTF encode write_rtf("rtf/intro-ae1.rtf") # Step 3 Write to a .rtf file