Actions define what can be performed over an object, character or active area.
"Examine" "Take" (only objects and active areas) "Use" "Custom" (both with one element and with two) "Use with" (only objects) "Give to" (only objects) "Talk to..." (only characters)
The conditions of the actions indicate when it can be performed. If the conditions of the actions are not active, the action button will not be drawn (unless it is an action with a default behaviour, see below).
The effect of the actions are the consequence of it being chosen by the player.
When an action has "Not effects" defined, it will always be available to the player (even when its conditions are not met). This are the effects of the action when the conditions aren't met.
All elements have the "Examine" action by default, which leads the main character to "speak" the "Detailed description" of the element. In objects, the "Grab/Use" action also appears by default, and results on the main character indicating that such an action cannot be performed if the player choses it. The same is true for the "Talk to..." action with NPCs. The behavior of the default actions is overwriten if any of these actions is defined by the creator.