12 BASIC PRINCIPLES OF ANIMATION
The following short descriptions are paraphrased by Nataha Lightfoot and expanded upon by me from the "Illusion Of Life" by Frank Thomas & Ollie Johnston.(pp.47-69) Look these up and read the original version for a more complete and thorough understanding.

Click on any of the principles below to go to the definitions

1. Squash and Stretch
2. Anticipation
3. Slow In and Slow Out
4. Arcs
5. Timing
6. Follow Through and Overlapping Action
7. Secondary Action
8. Exaggeration
9. Staging
10. Straight Ahead Action and Pose to Pose
11. Solid Drawing
12. Appeal

Here are some additional principles that I've added into the list:

Key Animation

Line of Action
Lip Sync

Observation

Path of Action
Pencil Testing

Personality Animation

Reaction
Reading Timing Charts

Realistic Timing
Recording Sound
Research
Reviewing and Anylizing Your Pencil Test
Rough Keys

Scene Planning
Scheduling Yourself
Secondary Action
Showing a Thought Proces

Slugging the Sheets
Software
Solid Drawing
Soundtrack Breakdown
Spatial Relationships
Staging
Straight Ahead and Pose-to-Pose Animation

Thumbnails
Timing Charts
Timing is Everything
Transferring Sound to the Computer
Try, Try Again

Weight
What is an Assistant?
What Kind of Computer do you Need?
Why Book Keeping is so Important
Working From a Given Design
Working From a Given Key Pose


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