add settings section in README

README.md

@@ -60,6 +60,23 @@ Enjoy !
 
 **NOTE** : Some librairies may be missing, you need to install it one by one (test to launch ./et.x86 and see missing libs)
 
+## Settings
+
+More useful informations : https://wiki.archlinux.org/title/Wolfenstein:_Enemy_Territory
+
+### Set screen size in **1920*1080**
+* Open the player configuration file:
+```bash
+vi $HOME/.etwolf/etmain/profiles/<username>/etconfig.cfg
+```
+
+* Override this settings
+```cfg
+seta r_mode          -1      // -1 mean we are using a custom screen resolution
+seta r_customwidth   1920    // monitor's width
+seta r_customheight  1080    // monitor's height
+```
+
 ## Common errors
 
 On **Ubuntu 20.04** :