Jiaqi Liu

What file system is it? Is your C: drive SSD/HDD or a USB drive?

In case you don't know, there is a portion of the title bar which is reserved by the system that you can drag anytime you want: 

 zheb这部分区域任何时候都可以用鼠标拖动，然后这个界面也可以用键盘快捷方式点击3个选项，或者你也可以按Esc可以退出这个窗口。至于为什么是居中显示的，你可能就要问微软为啥这么设计了。

其他UWP应用也是这样吗？

Are you using desktop pc or laptop? Did your compute go to sleep while using?

This is purely dev/coder driven use case where majority of Notepads users are not developers or coders. I won't implement it or providing settings for switching the starting number of...

字体是自动搜索当前支持的系统内安装的字体，没有什么特别处理的。不是很确定你装的是哪一种宋体。你可以多试试第三方的字体库看看。

First, it is called "Session" not "Archive" or "Persisted Data" for a reason. It supposed to be deleted after you reinstall the OS. This is session snapshot feature not auto-save...

I don't mean that you cannot do it or this is not allowed. What I mean is that this should not be a feature or should ever be documented since...

For 1. I don't feel like it is a bug. For 2. You should raise a bug ticket/report to Microsoft since this is a bug or maybe unsupported scenario of...