How do I pop up the description and inputs of a function in R?

Question

I am talking about this little while line that tells me what to write next. It clearly states that I have to input data, then number of rows, then number of columns on so on and so on.

This is very helpful to know since plenty of functions like c doesn't pop out automatically when pressing "tab" like matrix does in the picture posted.

Answer 1

Push tab inside the function and for most packages you can scroll through the input options!