Hi ​@kawsikan_k ,

I believe that the export button on the task screen is a custom button, as that is not a baseline option.  It would seem that an button was added to the screen that then would execute a XML. The xml likely looks like the following

<perform_export_tablemap>
  <parameters>
    <map_name>Sample_map_name</map_name>
    <constraints></constraints>
  </parameters>
</perform_export_tablemap>

If I am correct then you should be able to add a blank button on the part usage screen and add the xml to it. You will first need to create a import/export map that you will then call in the xml.

Regards,

Morris