As for as I know, there is not preview option in Magento back-end. After you saved the product you need to find it in category at front-end to see how it looks.
There is also Store Manager for Magento application, this is desktop solution for data management.
Using which you can view product or category on frontend in 2 clicks -
You can check free 14-day version at - https://www.mag-manager.com/free-download/
This a complete toolkit with the set of other advanced features that default Magento does not offer, but you may find useful.