Using the Value Help for the Selection Object
If a function needs a selection object as an argument, you can see available arguments by pressing CTRL + space .
This provides value help for the keys, which represent the dimensions of an associated data source, or for the values of keys, which represent a dimension member of the corresponding key/dimension.
To start the selection object you have to type in braces {} within the parentheses ( ).
If you have a selection object like sel in the following examples, you can get value help for dimensions of an associated data source when you try to access its properties by pressing CTRL + space after the dot operator.
You can also get value help for the corresponding dimension members of the dimension property when you try to assign or compare the property.