You can directly link request field behavior to the status values for the request. Select a field and a request status and assign that field's attributes under the given request status. This is done by selecting among the options at the bottom of the screen.
You can set view and edit access for a field depending on request status using the following controls on the Status Dependencies tab:
Visible. This option determines whether or not a field is visible at a specific request status. To hide the field at the request status, select No.
Editable. This option determine whether the field can be edited at a specific request status. To make the field read-only at this request status, select No. To make the field modifiable at the request status, select Yes. If the Required, Reconfirm, or Clear option is set to Yes, then Editable must be set to Yes.