Pratap,

If you just want to hide those columns (if you think that you might need them in future), navigate to collection settings-> column preferences and uncheck the column that you want to hide.

Let me know if it doesn't answer your question.

Thanks,

Pranav

Pratap,

Your reply to this forum post opened a ticket on portal. Just copying your reply here:

"pranav, thanks for replying. actually i don't want to keep those columns  in the collecton as they take some space. any way to completely delete  those columns from the collection? thanks"

I will get back to you on this asap.

Thanks,

Pranav

Pratap,

You will have to delete all the values present in the column which you want to delete from the collection. Once you have an empty column, just go to 'Collection Settings'->'Column Preferences' and click on 'Reset Column Preferences'. The empty column will be deleted from the collection.

Thanks,

Pranav

Kinvey