I have create search from discover tab and added to dashboard. I have selected fields I want to show data. Fields names are as per logstash but I want to change those on dashboard. I have tried from saved objects but then values are not showing in search.
7.4 is indeed an old version but you can create an scripted field with the name you want and just output the original field so for the flights sample dataset you can create a new scripted field Destination_Airport with the script:
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