You can either create a new screen or copy an existing one.
Procedure
To create a new screen, enter the program SAPLXLRF or SAPLXLHU in the screen painter.
To find out which program you have to enter, do the following:
In the screen painter, enter the program SAPLLMOB and the dummy screen number 1xxx. The Flow Logic of the dummy screen contains a call for the customer-subscreen in which the respective program (SAPLXLRF or SAPLXLHU) is included.
To copy a screen, proceed as follows:
Enter the program SAPLLMOB and a screen number.
Choose Element List and delete the last field, the "OK_CODE".
Choose Subscreen in the tab page Attributes in Screen type.
Save your data entries under the relevant development class in the customer's namespace.
