How to display Sort Ascending and Sort Descending names in the result page of newly added Model Attribute

Hi All

Good day

I had added one Model Attribute in the webui result page.i am getting data as expected but i am not getting Sort ascending and sort descending values to do sort on my newly added model attribute.

as per standarded  it is getting displayed for all other result page columns when i click on any one of the standarded column in the result page.

please suggest how can i display sort ascending and sort descending values on my newly created model attribute and how to make event on those if user click on any sort?

Thanks

Subhani Shaik