Update docs on special characters

keymapper/groups.py

@@ -410,7 +410,7 @@ class _Groups:
     def __getattribute__(self, key):
         """To lazy load group info only when needed.
 
-        For example, this helps to keep of key-mapper-control clear when it doesnt
+        For example, this helps to keep logs of key-mapper-control clear when it doesnt
         need it the information.
         """
         if key == "_groups" and object.__getattribute__(self, "_groups") is None:

keymapper/system_mapping.py

@@ -51,7 +51,7 @@ class SystemMapping:
     def __getattribute__(self, key):
         """To lazy load system_mapping info only when needed.
 
-        For example, this helps to keep of key-mapper-control clear when it doesnt
+        For example, this helps to keep logs of key-mapper-control clear when it doesnt
         need it the information.
         """
         if key == "_mapping" and object.__getattribute__(self, "_mapping") is None:

readme/usage.md

@@ -87,12 +87,18 @@ names can be chained using ` + `.
 Check the autocompletion of the GUI for possible values. You can also
 obtain a complete list of possiblities using `key-mapper-control --symbol-names`.
 
-The available symbols depend on the environments keyboard layout. For example,
-mapping a key to an exclamation mark is not possible if the keyboard layout is set
-to german. However, it is possible to mimic the combination that would be required
-to write it, by writing `Shift_L + 1` into the mapping. This is because key-mapper
-creates a new virtual keyboard and injects numeric keycodes (with the benefit of being
-compatible to all display servers).
+The available symbols depend on the environments keyboard layout, and only those that
+don't require a combination to be pressed can be used without workarounds (so most
+special characters need some extra steps to use them). This is because key-mapper
+acts like a keyboard device. Furthermore, if your configured keyboard layout doesn't
+support the special character at all (not even via a combination), then it also won't
+be possible for key-mapper to map that character at all.
+
+For example, mapping a key to an exclamation mark is not possible if the keyboard
+layout is set to german. However, it is possible to mimic the combination that would
+be required to write it, by writing `Shift_L + 1` into the mapping. This is because
+key-mapper creates a new virtual keyboard and injects numeric keycodes (with the
+benefit of being compatible to all display servers).
 
 Key names that start with `KEY_` are keyboard layout independent constants that might
 not result in the expected output. For example using `KEY_Y` would  result in "z"