how to display the desc. of cost center GL account in PR and PO ?

Hi Team,

Can anyone help me to display the descriptions of Cost center and GL accounts in below tcodes.

1 ME51N Create Purchase Requisition

2 ME52N Change Purchase Requisition

3 ME53N Dispaly Purchase Requisition

4 ME21N Create Purchase Order

5 ME22N Change Purchase Order

6 ME23N Display Purchase Order

Thank you so much for the advanced help.

Thank you,

Narasaiah T