Sign Elevators

Skip the staircases — sign elevators teleport you straight between floors.
Setting one up
Place a sign and write one of these on the first line:
[Lift] — two-way (up and down)
[Lift Up] — up only
[Lift Down] — down only
Place a second lift sign directly above or below the first, at the same X and Z (lined up vertically).
You can use standing, wall, or hanging signs.
Riding it
Right-click a lift sign to go up.
Sneak + right-click to go down.
When you place a lift sign it confirms with a message and shows a brief guide line so you can see it lined up.
The elevator will not teleport you if the destination is blocked or has no floor — clear the landing spot if a lift seems to do nothing.