Call of Duty: Warzone drops you straight into the action with up to 150 players competing on the same map. Verdansk may be huge, but you're sharing it with a lot of opponents and the encroaching poisionous gas is there to ensure that you'll never be too far from one another.
So, you won't have time amid the flying bullets to double check your control scheme and a mistaken button press can reveal your location or waste a consumable at the worst moment.
In order to be the best Warzone player you can be, you need to master your control scheme. While you cannot freely rebind any action to any button like on PC, you can switch between a number of controller presets with subtle changes in layout. If you don't want to stick to the default controls, study those layouts carefully. The default controller layout for Xbox is as follows:
Movement - Left Analog Stick
Sprint/Steady Aim - Left Analog Stick (Press)
Aim/Look - Right Analog Stick
Melee - Right Analog Stick (Press)
Jump/Mantle/Open Parachute - A
Crouch/Cut Parachute - B (Tap)
Prone - B (Hold)
Slide - B (When sprinting)
Use/Reload - Y
Switch Weapon - X (Tap)
Equip Armor - X (Hold)
Tactical Equipment - Left Shoulder Button
Lethal Equipment - Right Shoulder Button
Aim Down Sights - Left Trigger
Mount Weapon - Left Trigger (Contextual)
Fire - Right Trigger
Ping - D-Pad Up (Tap)
Gesture/Spray - D-Pad Up (Hold)
Fire mode - D-Pad Left
Activate Killstreak - D-Pad Right (Tap)
Killstreak Menu - D-Pad Right (Hold)
Drop Ammo/Drop Cash - D-Pad Down
Open Map - View
Pause Menu - Menu
Call of Duty: Warzone supports keyboard and mouse on Xbox One. If you want to gain the fair advantage over other players, we highly recommend using KB+M instead of a controller, since using a mouse to aim is significantly more precise than an analog stick. In wired configuration, any keyboard and mouse with a USB connector should work, but only first-party KB+M peripherals will work wirelessly. Simply plug in your keyboard and mouse of choice and the console will set them up automatically.