How to use Archives Widget
1. Go to Dashboard > Pages > Add New
2. Type title name in title field ( Eg: Archives )
3. Enter Title for your widget.
4. By default, Archives displays as a list. If you would like you can make it as a Dropdown menu to save space. Also, you may like to give an hint to your users about how many posts are there in an archive. Enable appropriate options.
5. Click on Done when you're done.