diff --git a/doc/water/index.rst b/doc/water/index.rst
index 925ef0f17e..bcff686118 100644
--- a/doc/water/index.rst
+++ b/doc/water/index.rst
@@ -21,11 +21,15 @@ model and scenario specifications can be either set manually in ``cli.py`` or sp
 
 .. code::
 
-   Usage: mix-models water [OPTIONS] COMMAND [ARGS]...
+   Usage: mix-models water-ix [OPTIONS] COMMAND [ARGS]...
+
+   MESSAGEix-Water and Nexus variant.
 
    Options:
-   --regions [ISR|R11|R12|R14|R32|RCP|ZMB]
+   --regions [ADVANCE|B210-R11|ISR|R11|R12|R14|R17|R20|R32|RCP|ZMB]
                                     Code list to use for 'node' dimension.
+   --ssp [LED|SSP1|SSP2|SSP3|SSP4|SSP5]
+   --time TEXT                     Manually defined time
    --help                          Show this message and exit.
 
    Commands:
diff --git a/doc/whatsnew.rst b/doc/whatsnew.rst
index ec29d5b3d7..037678b580 100644
--- a/doc/whatsnew.rst
+++ b/doc/whatsnew.rst
@@ -4,6 +4,7 @@ What's new
 Next release
 ============
 
+- Introduce a SSP configuration for cooling technologies with share constraints (:pull:`256`).
 - :mod:`message_ix_models` is tested and compatible with `Python 3.13 <https://www.python.org/downloads/release/python-3130/>`__ (:pull:`250`).
 - Support for Python 3.8 is dropped (:pull:`250`), as it has reached end-of-life.
 - Connect the water module to the cost module for cooling technologies (:pull:`245`).