> Timeline > Layer. 8. Choose Edit > Paste In Place. The drink fill shape is pasted into the new layer. [View full size image] 9. Name the layer Mask. 10. Right-click (Windows) or Control-click (Mac OS) the Mask layer, and choose Mask. Flash locks the Mask layer and indents the layer beneath it. [View full size image] 11. In the Timeline, select all the layers from Bubble to Bubble9. To select multiple contiguous layers, click the first layer, press the Shift key, and click the last layer. 12. In the Timeline, drag the selected layers onto the Bubble10 layer (the indented layer). All the layers are indented below the Mask layer, so the Mask layer masks all of them. No bubbles will appear outside the drink fill.   Testing a Movie Preview your animation to make sure it's behaving as you expect. In fact, you should preview the movie frequently so that you can troubleshoot or simply tweak your animation. To preview the movie, choose Control > Test Movie. You see the full effects of the drink, the bubbles, and the fizz-all created with rectangles, ovals, and lines. You've created an animated fizzy drink! To use this animation in other projects, you can copy all keyframes from the main Timeline and paste them into a new movie clip symbol, which you can then place wherever you want to use it.   Review Review Questions 1 What are the three drawing modes in Flash, and how do they differ 2 How can you draw a perfect circle using the Oval tool 3 When would you use each of the selection tools in Flash 4 What does a mask do Review Answers 1 The three drawing modes are merge drawing mode, object drawing mode, and primitive drawing mode. * In merge drawing mode, shapes drawn on the Stage merge to become a single shape. * In object drawing mode, each object is distinct and remains separate, even when it overlaps another object. * In primitive drawing mode, you can modify the angles, radius, or corner radius of an object. 2 To draw a perfect circle, hold down the Shift key as you drag the Oval tool on the Stage.