You can access the Clipboard pane either from the Text Toolbar or from the Items Toolbar. Both have a Clipboard section on the left. Click on the More… icon in the bottom right corner of the section to show the respective clipboard.
When you paste (using the Paste button or by pressing Ctrl+V), the top item from the list will be pasted. Alternatively, you can select an item from the list and then press Paste or Ctrl+V.