How to select one of the buffers that match a substring in "switch-to-buffer"?

[KARR, DAVID]

I remember in an older "switch-to-buffer" user interface, if I typed a 
substring of a buffer name that matched more than one buffer, there was a 
convenient interface that let me select one of the choices, even if the 
substring I entered didn't start at the beginning of the file name.  I think 
that might have been called "iswitchb", but I think that's been deprecated.  In 
the current interface, it lists the buffer names that match the substring, but 
it appears that all I can do at this point is erase what I've entered so far 
and then enter the string that begins the buffer name I want.

Is there any way to get the "old and enhanced" behavior?