CentOS - Oct 2016 - 3rd and 4th keys keymapped in Keyboard Layout???

Looking at the Keyboard Layout in CentOS 7.2, there are a 3rd and 4th 
characters for many keys.  E.g., for 'd' there are the division sign and
the degree symbol.  I've tried the obvious key combinations-- Alt-d, 
Alt-Shift-d, etc.-- but no luck.  Is there some configuration change I 
need to make in Gnome...?  or what do I need to do to access these 3rd 
and 4th key characters?

tia