This action event can be used to get a certain attribute and store it in the specified variable. You have to enter the name of the target variable and you have to select the kind of attribute that should be queried. For object attributes you will also have to select the object to query from the listview.
For attributes that query the states of global objects (e.g. sounds) you will have to enter the identifier of the global object in the respective widget. Some attributes like mouse position etc. don't require you to provide any additional information at all.
To set attributes, use the Set attribute action event. The chapter on Set attribute also contains a list of all attributes together with some explanatory remarks. See Set attribute for details.