In p.75 of the operation manual (Cubase 6)
All these are giving me other result that creating a part.
Draw a part on an audio track with the Pencil tool.
You can also draw parts by pressing [Alt]/[Option] and using the Arrow tool.
•Double-click with the Arrow tool on an audio track, between the left and right locator.
You can use Copy and Paste or Drag and Drop in the Audio Part Editor to add events to existing audio parts (see “Window overview” on page 295).