Source Select - You can either view all the monsters or you can view only those monsters which meet the criteria you have specified in the Configuration section of the program.
Selecting a Monster.
Double clicking on a monster will add that monster to your encounter.
You can select a single creature with a single click or hold down the Ctrl key to select multiple monsters; then click the Ok button to close the dialog box and add the selected Monsters to your encounter.
Clicking Cancel will close the dialog box without adding the selected monsters to your encounter.