If you check the Copy from box you can select the price alternative from where you want to load the price. In the Adjust price field you select the price alternative to which you want to copy. The system will apply currency conversion if one of the price types has another currency than your company currency. At the bottom of the window you will see a warning text regarding this.
If you have activated the setting Use future price in price lists, customer/supplier links?, under Price Management under the System tab in the Settings procedure, you can also choose between future prices/price lists.
Price Alternatives
Here you select the price alternative from which you want to load the price. The price alternative's currency will appear in the field to the right, and in the list itself, if it is an external price type (using a foreign currency).
Discounted Price
If you select Customer price or Supplier price, the check box Discounted price appears. These two price types have a gross and a net price. Check this box if you want to load the discounted (net) price.