lyx~是什么类型的文件？为什么在每个lyx文件外，都会有同名的lyx~文件？

Question

lyx是什么类型的文件？为什么在每个lyx文件外，都会有同名的lyx文件？
如下图所示：

Answer 1

我知道了，是备份文件。要是嫌弃它不好看，可以换文件夹存储。

Meaning of the ".lyx~" File https://latex.org/forum/viewtopic.php?t=16493

As Stefan said, it is a backup file indeed. If you rename your main .lyx file, a new .lyx~ file will be created, with the new name, while the old one, with the old name, will not be deleted. It is good to have these files in case of a disaster (e.g., power-cut might destroy your document completely or mess it up badly).

There are two things you might want to know regarding backup files:

1. You can tell LyX how often it should create/update backup files, or even disable them completely (which is not a good idea): Tools > Preferences > Look & Feel > User Interface (first two checkboxes under "Document")
2. You can create a directory in which backup files of all your projects will be stored, instead of the current directory: Tools > Preferences > Paths > Backup directory.