Update README.md

README.md

@@ -20,18 +20,50 @@ It should work both natively on GNU/Linux and on Windows under WSL, provided you
 ((c)`dialog` works everywhere).
 
 - Clone it with `--recursive`
-  ```
+  ```bash
   git clone --recursive https://github.com/Depau/shcrt.git
   ```
 - If you forgot about it...
-  ```
+  ```bash
   git submodule init
   git submodule update
   ```
 - Simply run the script:
-  ```
+  ```bash
   ./shcrt
   ```
+  
+## Configuration
+
+Configuration can be placed in `~/.shcrtrc`. It must be a sourceable by bash, use bash syntax.
+
+### Custom GUI mode
+```bash
+export supermode=YOUR_CHOICE
+```
+
+It must be set to one of the GUI back-ends supported by [EasyBashGUI](https://github.com/BashGui/easybashgui/).
+
+At the time of writing, supported modes are:
+
+- `dialog`: ncurses terminal based GUI (good for WSL)
+- `whiptail`: another terminal based GUI (good for WSL)
+- `none`: uses internal shell-based EBG GUI, which uses `echo` and `read`
+- `zenity`, `yad`, `gtkdialog`, `xdialog`: GTK-based GUIs for GNOME-based desktops
+- `kdialog`: Qt5-based GUI for KDE or Qt-based desktops
+
+Needless to say, unless you're using `none` the desired GUI back-end needs to be installed.
+
+The script includes an experimental wrapper for [native Windows Zenity](https://github.com/kvaps/zenity-windows/) on WSL.
+It displays but it doesn't actually work, probably due to Windows line endings needing to be fixed.
+
+### Emojis
+```bash
+export emojis=YOUR_CHOIC
+```
+
+- `auto`: always display emojis on GNU/Linux, disabled on WSL because of crappy terminal
+- `yes`, `no`: force enable/disable
 
 ## Bugs