When an enemy is likely to spot you, the white indicator shows the direction of the enemy threat. When you have taken damage, the red indicator shows the direction from which the attack came.
Reticle
Appears when you are aiming a weapon in shoulder view.
Markers
You can mark enemies and other objects in your field of view.
Weapon
The numeric display shows remaining rounds in magazine/total rounds in your possession.
Action Icon
An action icon appears along with a button icon whenever you can perform context-sensitive actions, such as climbing up something or unlocking a door.
*Unlike with past titles in the series, there is no onscreen Life gauge.