+The //grmlzshrc// now supplies three prompt themes compatible with zsh's
+**promptinit** system. The three themes are called **grml**, **grml-large** and
+**grml-chroot**.
+
+By default, **grml** is used, unless //$GRMLPROMPT// is set to a value larger
+than zero, in which case **grml-large** is used. Lastly, if //$GRML_CHROOT// is
+non-empty, **grml-chroot** is used.
+
+As usual, with promtinit themes, the user may switch to a different theme using
+the //prompt// utility:
+\
+```
+ prompt grml-large
+```
+
+That will use the **grml-large** prompt theme.
+
+The themes are highly customisable. The main source of documentation about
+customisation is the main **grml** theme's doc-string, that is available via
+the following command:
+\
+```
+ prompt -h grml
+```
+
+The other themes also come with doc-strings, but the main theme's is the
+canonical reference about all of them.
+
+This feature requires version //4.3.7// of the shell. Older versions will use
+the classic grml prompt as a fallback.
+
+A note to people who like customisation: If you are **not** using a prompt
+theme for your customisation, but you're either statically setting $PS1 (or
+$PROMPT) or you're constructing one of those variables in zsh's \`precmd()'
+function, make sure you are turning the zsh's prompt theme system **off**
+before doing so. A correct example customisation could look like this:
+\
+```
+ # Turn the prompt system off:
+ prompt off
+ # Customise the prompt yourself:
+ PS1='%~ %# '
+```
+
+You also add your own tokens by using the \`grml_theme_add_token()' function.
+Call the function without arguments for detailed documentation about that
+procedure.