Editing : Editing Basics : Basic Editing Commands : Paste Command

Paste Command
Use the Paste command to place the contents of the Clipboard at the Edit insertion point, and overwrite any material already there.
To paste a selection or clip:
1 If you want to constrain the insertion point or the selection to the current Grid value, enable Snap to Grid.
2 Do one of the following:
*   
With the Selector tool, click in a track at the point where you want to paste the material.
– or – 
*   
Use the Selector or Time Grabber tool to make a selection where the material will be placed.
*
With the Grabber tool, Start-click (Windows) or Control-click (Mac) a clip to conform it to the current selection.
3 Choose Edit > Paste.
If pasting at an insertion point with Shuffle Clips enabled, material to the right of the paste point is shifted to the right. Otherwise, any material within the paste range is overwritten.
If pasting into a selection with Shuffle Clips enabled, the selection is replaced by the Clipboard’s contents with the adjacent material slid left or right as necessary. Otherwise, the selection is also replaced but with the surrounding material remaining unchanged.
*
When working with MIDI, you can merge the contents of the Clipboard with material in the destination track using Edit > Paste Special > Merge. For more information, see Paste Special.