enabling show lockdown option will put lockdown option in power menu. Menu which comes up when you press power button for 5 seconds. By clicking on lock down option in power menu disables smart lock and biometrics unlock.
Bhai..in simple words..aap jab lockdown.option ko enable karte ho..to aapke phone ki security k liye sirf pin daalne pe hi phone khulega..lekin tab jab aap lock down option ko press karoge..
Jab aap phone switch off ya restart karne k liye power button press karte ho tab ye 4th option bhi aayega lockdown mode..aur jaise hi aap lockdown icon press karoge..to dekhna phone k homescreen pe jaane k liye sirf pin ki zarurat hogi..but ek baar..kyunki ye ek security mode hai..especially jab aap raat me so rehe ho to lockdown mode ko press kark so jao..then no one can bypass phones security because that time only pin will gonna work..
