Merge pull request #96 from onesounds/main

Add File Manager document

Author: onesounds

_sidebar.md

@@ -1,6 +1,7 @@
 - [**Introduction**](/README.md)
 - [**Installation**](/installation.md)
 - [**Settings**](/settings.md)
+- [**File Manager**](/filemanager.md)
 - [**Usage Tips**](/usage-tips.md)
 - [**Support**](/support.md)
 - [**Plugin Store**](https://www.flowlauncher.com/plugins/)

filemanager.md

@@ -0,0 +1,28 @@
+## Custom File Manager
+If you want to use a file manager other than the default Windows File Explorer, you need to set it under Settings > General > Custom File Manager. The default values for each file manager are listed below.
+
+%d represents the directory path, and %f is the argument used when opening a file. -select is an option supported by some file managers that allows the selected file to be highlighted or scrolled into view when opening its location.
+
+### Files
+docs: https://files.community/docs/contributing/updates
+```
+Path : Files or Files-stable
+Arg For Folder : "%d"
+Arg For File : -select "%f"
+```
+
+### Directory Opus
+docs: https://www.gpsoft.com.au/help/opus11/index.html#!Documents/Go1.htm
+```
+Path : (installed path)dopusrt.exe
+Arg For Folder : /cmd Go "%d" NEW
+Arg For File : /cmd Go "%f" NEW
+```
+
+### Total Commander
+docs: https://www.ghisler.ch/wiki/index.php/Command_line_parameters
+```
+Path : (installed path)TOTALCMD64.exe
+Arg For Folder : /O /A /S /T "%d"
+Arg For File : /O /A /S /T "%f"
+```