Step 1

First, find any image, object which you like to use for this lesson.

Step 2

Create a new flash document. Choose now File > Import > Import to stage (Ctrl+R) and import any image, or object into a flash stage.

Step 3

While the image, object is still selected, press F8 key (Convert to Symbol) to convert it into a Movie Clip Symbol.

Step 4

While the new made Movie Clip is still selected, go to the Properties Panel below the stage. On the left side, You will find the Instance name input field there. Call this Movie Clip "image_mc". See the picture below!



Step 5

It's time for buttons, so, create two buttons (plus and minus) like it is shown on the picture below!



Step 6

Select now the Selection Tool (V) and select only plus button. After that go to the Properties Panel below the stage. On the left side, You will find the Instance name input field there. Call this button "PlusButton". See the picture below!



Step 7

Select now only minu button and go again to the Properties Panel below the stage. On the left side, You will find the Instance name input field there. Call this button "MinusButton". See the picture below!



Step 8

Create now a new layer above the layer 1 and name it action.

Step 9

Select the first frame of layer action and go to the Action Script Panel (F9). Then, enter this code inside the actions panel:

PlusButton.onRelease = function() {
if (image_mc._xscale == 169 && image_mc._yscale ==270) {
image_mc.enabled = false;
}
else {
image_mc._xscale += 20;
image_mc._yscale += 20;
}
};
MinusButton.onRelease = function() {
if (image_mc._xscale == 10 && image_mc._yscale == 10) {
image_mc.enabled = false;
} else {
image_mc._xscale -= 10;
image_mc._yscale -= 10;
}
};

We're done now!

Test your Movie and enjoy!

Download source file (.fla)