Setting Windows Hello Pin in windows 10 will ease the work of login. User can simple enters the pin & login into their user account. This is because of Length of the pin is shorter than password.
To Set the Windows Hello Pin You need to do the following:
Go to All Settings
Then click on Accounts
Then click on sign in options
Then Click on Windows Hello Pin
A dialog box appear for enter your current password
Enter the current password
Then Click OK and your pin is set.