Q: How do I add items/icons/widgets to home screen from the dock?

On the OS X what are you referring to,  the Desktop?  There is no homescreen.

https://www.apple.com/support/macbasics/

You probably don't want to add applications to your desktop. Try clicking the LaunchPad icon in the dock; it'll bring up your applications like the iPhone home screen.

If you have gestures enabled and a trackpad, you can do a 4-finger pinch to get LaunchPad to show up. Or you can set up a keyboard shortcut in System Preferences.

JMarkyBB wrote:

 

Hiya Leroy,

 

Thanks for replying, yes by Homescreen I mean Desktop.

Mac Basics: Launchpad is the fast way to find and open your apps - Apple Support