How to use offline map function in Win10 Build 9888

According to foreign media reports, in the process of seamless connection between Windows Phone and Windows, there is a function that has not appeared yet, that is, save the map to the system and then offline. Use it below. But now, foreign media found this feature in Windows 10 build 9888. It is reported that this version of the system was exposed earlier this week.

Sometimes some users will think that offline maps are so important? But when you look at those ultra-cheap Windows tablets, you will understand the importance of this feature.
In addition, it is also an indispensable feature for users who don't want to use traffic to download maps every time. But now, Windows 10's offline map is still in the early stages of development, I believe Microsoft will continue to adjust to improve this feature.