SAP Table Maintenance Generator (TMG) is a tool used to generate a user interface for maintaining table data in SAP. The tool generates a screen that can be used to add, modify or delete data in a database table. Changing Column Description Step 1: Go to transaction code SE54 and input the table name. Click on Create/Change button after selecting Generated Objects. Step 2: Go to Environment > Modification > Maintenance Screen Step 3: Select the screen you want to change and press enter. Step 4: Click on the Layout button. Step 5: Double click on the column description you want to change. Step 5: Change the text field in the pop up window. Step 6: Now activate the changed screen Step 7: Now go to SM30 to check the change.