Todo:: write about buttons, triggers, ...

Use

Type(s)	Description
Altar, Altar Trigger	If a connection value is set, the altar will trigger all objects with the same value, when activated. This will only work once.
Button, Button Trigger	Every time the button is pressed or released, all objects with the same <connection> value are activated.
Creator	Whenever the connection value is activated, the creator gets triggered.
Detector, Marker	When the detector is triggered, all objects with the same connection value get activated.
Duplicator	An activator (lever, altar, button, etc.) with matching connection value is able to trigger this duplicator. Be very careful that players cannot abuse it to create endless amounts of money or other valuable stuff!
Gate, Inventory Checker	Whenever the inventory checker is triggered, all objects with identical <connection> value get activated. This only makes sense together with <blocking passage> disabled.
Handle, Handle Trigger	Every time the handle is applied, all objects with the same <connection> value are activated.
Magic Ear	The Magic_ear will trigger all objects with the same connection value, every time it is activated.
Magic Wall	Every time the <connection> value is triggered, the wall will cast it's spell. You should set <casting speed> to zero, or this won't have much visible effect.
Mood Floor	This should only be set in combination with <mood number> 4. Normally, monsters are affected by the mood floor as soon as they step on it. But charming (monster -> pet) is too powerful, so it needs to be activated. Typically it is connected to an altar, for buying a "hireling". But a powerful pet could as well be the reward for solving a quest. Or even better: It could be part of a quest!
Pedestal	When the pedestal is triggered, all objects with the same connection value get activated.
Pit	When a <connection> value is set, the pit can be opened/closed by activating the connection.
Sign & Magic Mouth	When a connection value is set, the message will be printed whenever the connection is triggered. This should be used in combination with <invisible> enabled and <activate by walking/flying> disabled. If activating your magic_mouth this way, the message will not only be printed to one player, but all players on the current map.
Teleporter	If a connection value is set, the teleporter will be activated whenever the connection is triggered. To use this properly, <activation speed> must be zero.
Timed Gate	Whenever the inventory checker is triggered, all objects with identical <connection> value get activated. This only makes sense together with <blocking passage> disabled. If unset, the gate opens automatically after some time.
Trap	When the trap is detonated, all objects with the same connection value get activated.
Trigger Marker	Unlike a regular marker this is the connection that triggers this marker to activate.