This dialog allows you to change slide parameters, effects and record the narrations.
You can remove the narration recorded by pressing the cross button next to the Narration field.
If your slide is a video fragment which comes with audio, you can enable/disable the audio by checking the box next to the Audio field.
Each function is represented by a different tab:
To see how the effect will look press the "Preview" button.
To apply the effect to the slide press the "Apply" button.
To reset the changes you've made press "Reset" button. This will reset changes for the current effect.