Paste

The User Interface > Preview/Edit Window > Text/Edit Tab > Editor Toolbar... > Paste

Paste from the Clipboard.  Again, most useful if you've set the "tack" button, and therefore some other Clip is on the Clipboard, and you can paste it into the Clip that you're editing.  Or, if you don't have the "tack" set, then you'll duplicate the current Clip into itself at the insertion point.