+<p>
+The <i>grmlzshrc</i> now supplies three prompt themes compatible with zsh's
+<b>promptinit</b> system. The three themes are called <b>grml</b>, <b>grml-large</b> and
+<b>grml-chroot</b>.
+</p>
+<p>
+By default, <b>grml</b> is used, unless <i>$GRMLPROMPT</i> is set to a value larger
+than zero, in which case <b>grml-large</b> is used. Lastly, if <i>$GRML_CHROOT</i> is
+non-empty, <b>grml-chroot</b> is used.
+</p>
+<p>
+As usual, with promtinit themes, the user may switch to a different theme using
+the <i>prompt</i> utility:
+
+</p>
+<pre>
+ prompt grml-large
+</pre>
+<p>
+That will use the <b>grml-large</b> prompt theme.
+</p>
+<p>
+The themes are highly customisable. The main source of documentation about
+customisation is the main <b>grml</b> theme's doc-string, that is available via
+the following command:
+
+</p>
+<pre>
+ prompt -h grml
+</pre>
+<p>
+The other themes also come with doc-strings, but the main theme's is the
+canonical reference about all of them.
+</p>
+<p>
+This feature requires version <i>4.3.7</i> of the shell. Older versions will use
+the classic grml prompt as a fallback.
+</p>
+<p>
+A note to people who like customisation: If you are <b>not</b> 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 <b>off</b>
+before doing so. A correct example customisation could look like this:
+
+</p>
+<pre>
+ # Turn the prompt system off:
+ prompt off
+ # Customise the prompt yourself:
+ PS1='%~ %# '
+</pre>