Although there are now some methods to modify FOV, such as using CE or using the Free view camera plugin, they are too complex and require tedious operations every time the game is launched, with some side effects

Using a PAK file permanently solves the problem of FOV, which is both simple and convenient, with no side effects!
But there is also a cost, you cannot change it anytime, anywhere in the game, And there may be conflicts with other mods that modify players' base files

Unzip the compressed file and you will see 3 folders and 1 readme file
Three folders represent the types of changes, and there are files with different levels of change in the folders. Choose one file that you like to use

Folder“-”: Narrowing the field of view file
Folder“+”: Expand the field of view file
In addition, I have found that changes in the field of view can affect the sense of distance in multiplayer mode. Since most of the time in multiplayer mode, third person perspective is used, so I have made some additional files that only change the first person field of view angle, or slightly change the third person field of view angle, to facilitate the simultaneous use of multiplayer mode and campaign mode
Folder "special+": Files for adjusting first person and third person perspectives separately

Open the folder and you will see some letters or words, Third and First
Comparison of the magnitude of changes represented by letters
XXL>XL>L>M>S
Third means third person perspective, and First means first person perspective
For example, file: FOV Third+S First+XL_ P. Pak
The meaning is: the third person perspective is slightly expanded, the first person perspective is greatly expanded

+S: Slightly expand the field of view
+M: Moderate expand the field of view, recommended options
+L: Significantly expand the field of view
+XL: Greatly expands the field of view, You may feel dizzy
+XXL: Expanding the field of view even larger than the oversized one, No playability, pure entertainment

-S: Narrowing the field of view slightly, does anyone think the game's original field of view is too broad?
-M: Narrowing the field of view moderately, the game is almost impossible to play
-L: Narrowing your field of view significantly, I think you must be crazy!
-XL: Hubble Space Telescope!!!!

After selecting a file, start enjoying your game!
note well! Don't throw everything in! Only one file can be selected for use!!!

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虽然现在已经有一些修改FOV的方案了，比如使用CE，或者使用自由视角相机插件，但他们太复杂，而且每次启动游戏都需进行繁琐的操作，还有一些副作用
用一个PAK文件永久解决FOV的问题，既简单又方便，无任何副作用！
但是这也有代价，你不能在游戏中随时随地更改视角，以及可能会与其他修改玩家基本文件的mod产生冲突

解压缩文件，你会看到3个文件夹和1个自述文件
3个文件夹表示了改动的类型，里面有一些改动幅度不一样的文件，选择1个你喜欢的文件来使用

文件夹“-”：缩小视野的文件
文件夹“+”：扩大视野的文件
此外，我发现视野的改动会对多人模式的手感和距离感产生影响，介于多人模式绝大部分时候都是使用第三人称视角来玩，于是我额外做了一些只改动第一人称视角，或者第三人称视角轻微改动的文件，方便一些对多人模式手感产生影响的人，让多人模式和战役模式可以同时使用
文件夹“special+”：第一人称与第三人称分别调整

打开文件夹，你会看到一些字母，或者Third和First单词
字母代表的改动幅度大小比较
XXL>XL>L>M>S
Third的意思是第三人称视角，First的意思是第一人称视角
例如文件：FOV Third+S First+XL_P.pak
意思是：第三人称视角小幅度扩大，第一人称视角超大幅度扩大

+S：小幅度扩大视野
+M：中等幅度扩大视野，推荐的选项
+L：大幅度扩大视野
+XL：超大幅度扩大视野，你可能会感觉头晕
+XXL：比超大幅度更大的扩大视野，没有可玩性，单纯的娱乐

-S：小幅度缩小视野，难道有人嫌游戏原本的视野太大？
-M：中等幅度缩小视野，游戏已经快不能玩了
-L：大幅缩小视野，如果你不是整活那你肯定有病！
-XL：哈勃太空望远镜！！

选择好一个合适的文件后，开始你的游戏！
注意！不要全部都丢进去！只能选择1个文件来使用！！！