[ILUG] vim filename completion

[Gavin McCullagh]

Hi,

I've been searching around the manual, google and the vim site but can't
find anything on this.

When opening a file from within vim you get a type of tab completion of
filenames which I've seen on some shells.  Specifically that when you hit
tab it completes with the entirety of the first file matching what you've
already entered and by hitting tab again you can cycle through the other
matches.  I daresay there's a termf or this but I don't know it.

Anyway, the default bash completion is different, ie to complete the
filename as far as it can without picking a file and then display a list of
the files matching.  I prefer this, particularly in dirs with lots of files.

Anyone know how to change this behaviour in vim?  Am I right in assuming
you must be able to?

Thanks 

Gavin