Clearing the selected value
To clear a value that was entered by selecting from a list, click the clear button to the right of the text box (if the text box has this button), or press Shift + F4.
Fig. 48. A text box with a clear button
To cancel the input and return to the previous value, press Esc.
In a multiline text, when you press Esc, you are prompted to save the changes. To save the changes, click Yes. To cancel the changes, click No. To return to editing the field, click Cancel.