r - knitr button in rstudio -


i'm beginner r , rstudio. 1 of first problems not have knitr option in rstudio, despite having installed knitr package. have checked , have last version of rstudio. aware of how dumb question is, can't ask after tried everything. shockingly, have knitr option/button @ work, rstudio installed in same fashion (apparently). i'm attaching screenshot of rstudio. ideas?

screenshot

you apparently don't have file saved standard extension auto-detect file type from. can save .rmd or whatever appropriate. alternatively in bottom right of source pane should see "text file" -> go ahead , click , change r markdown or r presentation or whatever appropriate particular file.


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