Carry On Together how to ping with the middle mouse button: the ping lands where you are pointing, and the same binding works while you are driving the truck.
Carry On Together how to ping: the binding
Middle Click - Ping sits at the bottom of the on-foot key list, and the driving key list shows the same binding, so you can point at a hazard from the driver's seat as well as on foot.
Pinging was added during the demo, and the newest build made it accurate: a ping lands where you are pointing rather than drifting off to the old spot. That matters more than it sounds, because a ping is a location, and a location that lands next to the sofa rather than on it sends the wrong person to the wrong piece.
Why a crew pings
A ping is how a co-op crew points out the piece that needs a second pair of hands, and it is most useful exactly where the job is hardest. The sheet marks pieces that need two people with a two-people icon, so a ping aimed at a piano is a request for a partner.
The radar on X and the map on M were rebuilt in the same update as the sheet and the ping, which means the radar, the map and the ping all agree about where things are.
It also solves the argument. Rather than describing a room, point at the refrigerator. And when the piece needs two people to move it at all, the two-player carry guide covers the lift itself.
Ping per player and in the lobby
The Tab player list is where pinging is managed per player. The same panel that pings also mutes, opens a Steam profile, kicks a player and sets the lobby to private or public, so you never have to hunt for a second menu.
If the person you want to ping is not in your session yet, the pause menu is where you send the invitation — the invite friends guide covers that, along with the lobby browser.