Content Assist (Autocomplete)
Content assist (autocomplete) can be manually triggered using the Trigger Suggest command or Ctrl+Space.
Some of the contexts when content assist is triggered automatically as you type are:
a dot (.) for accessing a struct member (field, method etc) as in bfm.do_write()
an equal (=) for assigning a variable, field, parameter, etc. as in assign hresp = 2’b00;
Proposals are presented in a list for you to choose from, which may contain suggestions from three categories:
things you can access in a scope (wires, regs, functions, tasks, etc., depending on the enclosing scope)
code templates
other things, like module instances