The easiest way to change the position of a clip is by simply tapping on the caption of the clip window and dragging it to a new location. You can drag a clip to a new location within its current track or to a new track altogether. If the clip is very small then you may find it useful to zoom in closer. This will give you a larger caption bar to work with.
If you need to move a clip by very small amounts, you can zoom in very close so you can see the precise start point of your clip.
For accurate and consistent positioning of clips, you may find it useful to use the grid lines. When the grid lines are turned on, clips will snap to the nearest grid line as you drag them. You can turn the grid lines off altogether by tapping the toggle button in the tool panel on the bottom left of the MixPad screen.
You can copy and paste clips to different positions and tracks. Simply select the clip you wish to copy, press Copy command at the menu, select the new location of the clip and press Paste to paste it.
To delete a clip from the work area, just tap Delete command at the menu.