What are the shortcut keys of the clipboard

I accidentally clicked out of the clipboard
But I forgot what I was doing
What are the shortcut keys of the clipboard

What application were you using? In xfce4-terminal for instance, you can use Ctrl-Shift-c and Ctrl-Shift-v to copy and paste.

I use the application Parcellite as a clipboard manager in the system tray (XFCE).