When working with sound recorded over a series of frames, you may need to adjust where the sound begins and/or ends on a specific frame. You can make these adjustments with Set Start of Frame Sound and Set End of Frame Sound
or by dragging the frame start and end markers. Any pieces of sound excluded from the frame by the adjustment become part of the sound for the previous or next frame. For example, if the start marker is moved 3 seconds to the right, those three second that were part of the current frame become part of the previous frame. If no previous or next frame is available, the icons are disabled.
To set the start of frame sound:
To set the end of frame sound: