I hope you are well today and thank you for your question.
To achieve this you have to use child theme of jevelin theme from here http://support.shufflehound.com/download/jevelin-child-beta/ and develop custom code in it to achieve this.
Developing custom code for custom functionality is beyond the scope of support that we provide here. See https://themeforest.net/item/jevelin-multipurpose-premium-responsive-wordpress-theme/14728833/support
If you are not a developer then you can consider hiring a developer to develop it for you. You can hire a developer from any freelance site. Shufflehound recommends the developer https://www.upwork.com/freelancers/~011652ffec8865c6d5