You can create a dissolve on both audio and video tracks at the same cut point.

To create a dissolve on multiple tracks:

1. Make sure that a cut exists on all the tracks where you want the dissolve.
   TipTo create a cut on all tracks, press Shift+Del.
2. Make sure that there are sufficient head and tails on all segments.
3. Place the positioner at the cut point by pressing B or N, or select all cut points.
4. Press Shift+End to create a dissolve on all the tracks.