Update Settings.md

Author: rdeioris

docs/Settings.md

@@ -20,4 +20,33 @@ ue.log(appearance_settings.properties())
 
 # assign meters as the default distance/length unit (as list of values)
 appearance_settings.DistanceUnits = [EUnit.Meters]
+
+appearance_settings.save_config()
+```
+
+Another example changing action mappings of the input system:
+
+```python
+import unreal_engine as ue
+from unreal_engine.classes import InputSettings
+from unreal_engine.structs import InputActionKeyMapping, Key
+
+inp = ue.get_mutable_default(InputSettings)
+
+km = InputActionKeyMapping()
+km.ActionName = 'Kill'
+key = Key()
+key.KeyName = 'x'
+km.Key = key
+km.bAlt = True
+
+km2 = InputActionKeyMapping()
+km2.ActionName = 'Explode'
+key = Key()
+key.KeyName = 'y'
+km2.Key = key
+km2.bAlt = False
+
+inp.ActionMappings = [km, km2]
+inp.save_config()
 ```