# Timing Pegs and Child Elements

After you add a peg and attach an element to it, you will notice that there is a blue Arrow and a small green button next to the icon for the peg. These two buttons help you simplify the display of elements in your Timeline and make it easier for you to work on the timing of your pegs and their child elements.

To use the Arrow button to show/hide child elements and change their timing:

- Click the Arrow button to collapse elements nested beneath the peg. This simplifies the display of elements in your Timeline.

When you collapse the parent peg in a hierarchy of elements, all changes you make to the timing of the parent peg are applied to the elements beneath it, including peg, drawing and image elements.

If you are animating a cut-out character, you can collapse the top-most peg in the hierarch to simplify your Timeline. Then you can use the Transform tool to select and animate the parts of the character visually in the Camera View window, rather than trying to locate the peg you want to animate in the Timeline and then transform it in the Camera View.

To use the red/green button to show/hide drawing and image elements and change their timing:

- Click the green button of the peg to hide the drawing and image elements attached to it. When you click the green button, it turns red and the drawing and image elements attached to it are hidden in the Timeline.

When the button is red, you can change the start time and duration of the peg and Toon Boom Studio will change the exposure of the attached drawing and image elements to match.

When the button is green and the Arrow is pointing down to show the child elements, changes you make to the timing of the parent peg are not applied to image and drawing elements that are attached to it.

See Also
Animating with the Transform Tool
Exposure Sheet and Timeline Windows
Adding Pegs and Attaching Elements to Pegs
Showing/Hiding Elements
Changing the Duration of a Peg
Changing an Element’s Start Time in the Timeline