Teleport to a placemark
Two buttons on the Placemarks panel move people, and both need a saved mark. The console can use coordinates or another player instead. You need community admin or director mode.
In the menus: ESC → Design → Placemarks
Send yourself or somebody else
TELEPORT ME takes the mark highlighted in SAVED MARKS and puts you on it, closing the menu on the way so you see yourself land.
SEND PLAYER TO MARK needs a row highlighted in both lists, a player on the left and a mark on the right. They are not asked.
Save a placemark covers everything else on the panel.
Where you land
You land on the mark, facing the way it was saved, never tilted, and your speed is cleared so a fall does not carry over. Sending one player to another lands them 64 units in front, facing the same way.
Nobody is warned and nobody consents. A player you send is moved immediately, mid-sentence and mid-fight if that is where they are.
Prefer the console?
/tp is a full alias for /teleport, and the panel's 2 buttons both send it.
teleport <placemark>
teleport <target> <placemark>
teleport <target> <target2>
teleport <x> <y> <z> <yaw>
teleport <target> <x> <y> <z> <yaw>
/teleport last reaches the most recently saved mark, and only on the one-argument form: as somebody else's destination it is ambiguous beside a player called that.
A target can be a connection slot number, an exact character id, or part of the name on screen as long as only one player matches.
/origin prints your position and yaw as 4 numbers ready for the coordinate form. With permission,
/origin <player> prints the same line for another connected player.