To apply function like:
§ Drilldown level not MDX function, implementation of MDX Generate and MDX Descendants function
for element function you need to
§ … select with mouse desired element (one row) and right-click with mouse
§ … select Element functions menu
for hierarchy function you need to
§ … right-click over member that belongs to desired hierarchy
§ … select Hierarchy functions menu
then select
§ … any Drilldown level from submenu

In our case let us try to:
drill countries to the level cities (two levels down).
Dialog will appear:

§ to select desired Level select button Add

After selecting level:

§ select OK
After confirmation result is:
