The only thing you need to know to run the Discount Cash Flow Rate of Return Analysis (DCFROR) is to enter data and highlight the cash flows range. Type in the cash flows, negative for cash-out (costs or investments) and positive for cash-in (revenues or returns). Use the mouse left button to click on the first row, drag down and release the mouse button.
You will automatically get this screen.
Now change the Discount Rate, you will get the new results.
Watch the changes when you type in any single digit.