The stock android launchers are very inflexable, pretty much the only thing that's adjustable at all are the size of widgets in 3.2+. Anything else is pretty much what it looks like and not changable.
If it's important enough you're gonna need to use a different launcher like launcherpro previously mentioned.
XDA Wiki Moderator
Nexus 4: Stock 4.4.4 (KTU84P) 2013 N7: Stock 4.4.4 (KTU84P)
iTouch 5G: 6.1.2 (10B146) Surface Pro 2: Win8.1u1 (6.3.9600.17085.amd64fre.winblue_gdr.140330-1035)