3 answers
Hi Sohail,
It might help if you can share a picture of what you are seeing. On my end, here is what it looks like for a custom object in my org called Accommodations.
1. In the object manager I go to my Accommodations object
2. In the lefthand pane, I click Search Layouts
3. This brings up the default Search Layout plus a list of all profiles, and what columns are displayed for each one. Next to each profile it says Default Layout, and this because I have not specified a custom search layout for specific profiles. That means, users in each profile are using the default search layout for that object, which I could then adjust the columns as needed.
Are you seeing something else when you access the Search Layouts screen?
Thanks!
Mikey