By default, effects are animated as a looping animation.
You may adjust them to specific times and sizes.
1
Drag an effect into the Stage. Under 'Scene Manager' you will see the name of the effect showing with the number '258' which is the effect's frames.
2
Right-click the effect and select Sprite Editor and open it. Select the Effect icon in the window instead of the Position icon. The effect will be activated.
3
You may also open the Timeline window to type in a specific time frame to change the animation. You will see a key on the frame once you change the animation.