Is there a way to add 'Special purpose' for an input value once the element has been created and has

Summary

Is there a way to add 'Special purpose' for an input value once the element has been created and has element entries?

Content

Is there a way to add 'Special purpose' for an input value once the element has been created and has element entries, using PBL or HDL? This field is ineditable when I go on the Input value edit screen.

 

Screenshot attached for reference.

 

Thanks,

Vibhuti