how to set "Not Null" & "Default" value for a field of a db table in DDIC?

Hi,

Please refer to the picture first: I didn't see the maintenance places for the last 2 properties of a field of dabatase table, "NOT NULL" u201CDEFAULTu201D (). Is that possible with SAP DDIC; if true, how to do it?

http://bbs.sjtu.edu.cn/file/PIC/1214474726179743.JPG

Sorry, i didn't find possibility to upload and display a picture in SDN, can only to upload it here; if you are afraid there is virus, don't click it.

Regards,

Said