Quick answers
How do I check how many bullets I have?
Hold Left Alt and press T to check the magazine, or Shift + T for the chamber. Your character estimates the count based on skill, so the number is approximate.
What is a quick reload?
Double-tap R: the magazine drops on the ground and a fresh one loads faster. Pick the dropped magazine up afterwards or lose it.
How do I see the extractions?
Double-tap O to show the list with timers. Some extracts need a condition such as a paid fee or a partner.
How do I lean slowly?
Hold Left Alt with A or D for a side-step lean that keeps your head low; Q and E are the full leans.
Why are there so many modifiers?
Tarkov binds Alt, Ctrl and Shift as layers so every action has a key without a long keyboard reach. Print the controls page and learn one layer at a time.