Canceling All the Data on a Screen
Use
You may want to cancel, or delete, the data you just entered. For example, you are missing a piece of required data and cannot proceed until you locate it.
Procedure
To cancel all the data you just entered on a screen, choose 
or choose Edit
The system removes the data on your current screen, closes the current screen, and returns you to the previous screen. Depending on the situation, the system may display a dialog box prompting you to confirm your action.