There are three different panes that you can make appear:
In the Lay-out toolbar, click on the Show Details button in the View section to show the Details pane on the bottom of your screen.
The content of the Details pane depends on which item you've selected
Logframe:
Planning
Budget
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.
It is possible you have to work with many different currencies and you want to calculate prices in the original currency and then get a total in your project's main currency.
The exchange rates pane allows you to set the exchange rate for every currency you use that is different from your project's main currency. Once you've set the exchange rate, the totals will be calculated automatically.
Also, if you have to update this exchange rate you don't have to change each individual budget item. Instead you change the rate in the Exchange pane, and then all the items that use this currency will be updated automatically.