Eliminate Domain Needed when Sign in to ADFS 3.0

Hello, 

So i want to custom adfs 3.0 so that user doesn't need to enter the domain (just their username) to the username box.

then, i found this article:

https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-R2-and-2012/dn636121(v=ws.11)

Then i tried Example 1: change “Sign in with organizational account” string & Example 2: accept SAM-account name as a login format on an AD FS form-based sign-in page , just to know if they works.

But apparently nothing works, how to verify if the jss already right ?

Any Help/Clue? Thanks :)