Knowing Symbols and Instances

Hello,
One of the great things about Flash is that it allows you to create a graphic once use it over and over again.This allows your Flash animation to download faster.
Now many of you must be thinking that what are symbols.Symbols are reusable elements and can be put in the library.In order to animate something in Flash it must be first changed into a Symbol.So the next question arises what are instances.When we place a symbol on the stage from the library it is called an instance of that symbol.
Creating Symbols.
Aim:Draw a fish.Converting a fish into a symbol and place in the library.
Step1:Select the fish by pressing Ctrl+A.
Step2:Group it by pressing Ctrl+G
Step3:Select Insert -->Convert to Symbols or Press F8
Symbol Properties dialog box will appear:
By default the behavior is on 'Movie Clip'.It is right option because some time we are not sure which behavior is the best.Button behavior is selected when we are creating action buttons.Graphics behavior is used for synchronization applications.
Step4:Name you symbol 'Fish',click that it's a Graphic and pick a registration point.
What is a Registration Point??
This is the point that you would use as the 'center' if you want to rotate the Symbol.
Step5:Click OK
Step6:Press CTRL+L to open the library window and notice one symbol 'FISH' in the library.
Step7:Delete the fish from the stag and drag it from the library for the use.
Try This!!
Draw an airplane in Macromedia Flash and convert it into a symbol.
Hope you will try this and if you are not able to do this excercise you can leave a comment or e mail me at ranibhardwaj31@gmail.com and ask your queries.I will surly repay them.Thanks for reading