When you click the Corpora datatype in the clipboard, the view for the object appears in the right hand side panel.
This view includes a table, where each row represents a specific corpus, being given the id, name and properties of the corpus.
To load a specific Corpus to the clipboard, select the appropriate row in the table and click the rightmost icon (highlighted by a red circle in the figure).
The Corpus datatype object now appears in the clipboard (red arrow).
This view can also be used to remove a Corpus (check Corpora Remove Corpus)