If you haven't loaded
library(randomForest
You'll get the message
No documentation for ‘randomForest’ in specified packages and libraries:
you could try ‘??randomForest’
in which case you can bring up the description page with
??randomForest
If you go to the bottom of the screen, there is a link to the index page for the documentation, which includes all the function. If you don't see an Index link, you probably need to close the search box in the lower right of the screen.