Quick answers
How do I vent as an impostor?
Stand on a vent and press E (Cross/A); arrows show the connected vents and E again moves you or climbs out. Crewmates cannot use vents unless the Engineer role is enabled.
How do I sabotage?
Press Tab (Triangle/Y) to open the sabotage map, then tap a sabotage icon: lights, reactor, oxygen, comms or doors. Doors are free; the others have a cooldown.
How do I call an emergency meeting?
Walk to the meeting button in the cafeteria or command area and press E. Each player has a limited number of meetings set by the host.
Can I play with a mouse only?
Yes: Settings › Controls › Mouse. Hold Mouse 1 to walk toward the cursor and click the on-screen buttons for Use, Report and Kill.
What does the Tab key show for crewmates?
The task map with yellow markers for your tasks; impostors see fake tasks and the sabotage options instead.