When you're trying to isolate specific characters using a Range Selector, you don't need to adjust the Start and End properties in the Timeline. As an alternative, you can drag the Start and End handles in the Comp window. You'll only see the handles if an Animator Group (or a property of that group) is selected in the Timeline. If you have more than one Range Selector in a group , make sure you've selected the specific Selector (in the Timeline) you want to adjust before dragging the handles.