what is the keyboard shortcut that gives me a popup of the names and types of a method that I am in the process of typing an invocation for ?

Hi there...

i know there is a key for this.. but my fingers just can't seem to remember it..


Say I type the following

    Thread.sleep(

and then after the "("  I want a hint of what the parameters to this method are...     I know there is some key that i can press that will pop up some help that tells me   'long millis'

please help me remember what that key is.

thanks
chris