Change user full name in Mac OSX Yosemite
From the Apple menu, select System Preferences. In “System Preferences”, from the View menu, select Users & Groups. If the padlock icon in the bottom left corner of the preferences window is closed, click it. Authenticate with an administrative account. Right-click your account name, and in the contextual menu that opens, select Advanced Options…. In the Advanced Options sheet, next to “Full name:”, enter your name as you wish it to appear when logging into your account. Click OK.
Set turn off display screen withoud sleep
System Preference -> Mission Control
There is a ‘Hot Corners..’ on the bottom. Click this button.
I define “Put Display to Sleep” when I move the mouse pointer to the right bottom corner. Of course, you can define yours