[OSM-newbies] Splitting a way into two ways

[Rick Collins]

I see in the Comparison of editors in the wiki that JOSM has the 
"ability to split ways".  But I can't find how to do that.  When I 
delete a node within a way, it just connects the two nodes around it 
(in opposition to what it says in the JOSM help - "If a node is 
deleted, the node and all ways and areas the node is part of are 
deleted as well.") to restore the way as a single way.

So how do I part the way into two ways.  I am trying to assign 
different tags to two parts of a road where it splits from single to 
dual, divided roadway.