CO02 Costing in display

Dear ALL,

We like to make all the field in "Costing" in "Control Data" tab of CO02 as DISPLAY MODE.

We mean to say that the user must not be able to make change in COSTING DETAILS.

All the feild like Costing sheet,Costing Variant,RA key,etc must be in display mode in CO02.

Suggest how this can be acheived.

Regards