Can we disable input in a long text field.
I have a requirement from my customer to enhance Purchase Order Create/Change/Display transactions (ME21N/ME22N/ME23N). The customer wants to read some data from a custom table and to print the same in the Item level text field 'Work Authorization Data'. I have done it. Now the customer want to know to whether I can disable further manual input by the users. Is there any way disable input of a long text field. Will it work the same way as normal input field disabling. If so then what should be the SCREEN-NAME?
Experts please give your inputs.