To make a selection,
Open the Select window,
Click on the chosen entity name, a window with the entity members will appear.
Click on the desired entity members or to select a set of contiguous items, click and drag the mouse down while keeping the button pressed.
Then click the Select button to select the highlighted items or click the Exclude button to select all other items.
When a selection is made the Selected column indicated the number of selected items.
The Total column indicates the total number of entity occurrence and the % Selected column shows the percentage of selected items on the total number.