Follow these steps to display additional details on an object with Ncurses:
Press Tab to reach the Storage Regions view.
Scroll down using the down arrow until
lvm/Sample Container/Sample Region is highlighted.
In the context menu, scroll down using the down arrow to highlight "Display Details..."
Press Enter to activate the menu item.
In the Detailed Information dialog, use the down arrow to highlight the "Logical Extents" item and then use spacebar to open another window that displays the mappings of logical extents to physical extents.