Browse to pick an enemy.

You can type the name of an enemy or type the enemy's ID number to make the cursor jump to it.

Click the "+New" button or press CTRL+N to add a new enemy.

Right-click on an enemy for a pop-up menu that lets you choose if you want to "Pick" this enemy, or if you want to edit it.

Press CTRL+F or click "Filter" if you want to filter the list to only show enemies that match a certain string of text.

You can press SHIFT+BACKSPACE if you want to delete all enemies after the currently selected one. Use with caution!
