MB52 change the unit of measure

Once you create the field exit for your field data element through RSMODPRF.

Then you have to assign that to the screen so that in that particular screen only it appears.

for that,

Execute SE38 transaction with program RSMODPRF and this time DO NOT give any Data Element Name and execute again.

Now you can see the data element for which you have created the field exit.

Then select that data element check box and click on Assign prog/ Screen button and assign the program name and screen number of the filed and click on the menu FIELD EXIT and ACTIVATE it.

Thanks,

Srinivas