Quick answers
How do I toggle first person in PUBG?
Press V (D-pad Up on controller) in a TPP match to switch your own camera; FPP-only matches lock it. Tap Mouse 2 to go into the scope instead of the over-the-shoulder aim.
What are the healing keys?
7 bandage, 8 first aid kit, 9 painkiller, 0 energy drink. The inventory also shows them; on controller hold D-pad Down for the wheel.
How do I lean?
Q leans left and E leans right; hold them while aiming to peek. On controller lean with the bumpers while aiming down sights.
How do I change seats in a vehicle?
Hold Left Ctrl and press 1–5 for the seat number; seat 1 is the driver. On controller open the seat menu from the D-pad.
How do I switch grenade type?
Press 5 to equip throwables, then G to cycle through frag, smoke, stun and molotov. Cook a frag by holding Mouse 2, then release Mouse 1.
Why does my aim feel different through each scope in PUBG?
Because it is different. PUBG keeps a separate sensitivity slider for every magnification from red dot to 15x, and most players have only ever changed one of them.
Should ADS be hold or toggle in PUBG?
Both, on different rows. Set Aiming — the over-the-shoulder camera — to Hold, and Scoping to Toggle. That way a peek never drags you into a scope you did not want to enter.