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Frame 15: Ball is in contact with the box

You need to make the ball rise up to its original position at frame 30.

Instead of moving to frame 30 and moving the ball back up in the air,

you'll use a different method.

TIPYou can zero the Z coordinate (or any other spinner) by right-clicking

the spinner arrows.

7 Put your mouse over the time slider's frame indicator (the grey box that
currently reads 15/100 and right-click.
The Create Key dialog appears.

8 In the Create Key dialog, change the Source Time to 1 and the Destination
Time to 30 , then click OK.
This copies the key from frame 1 to frame 30.

Creating Animation Using Auto Key | 481