This Navigate To command navigates to an overloading member or (if there are two or more of them) highlights such members in the text editor.
It is available anywhere within overloadable members: 
Tip
To navigate to the next highlighted overloading member, choose ReSharper | Find | Next Item or press Ctrl+Alt+Down. To navigate to the previous highlighted overloading member, choose ReSharper | Find | Previous Item or press Ctrl+Alt+Up.