diff --git a/CHANGES.md b/CHANGES.md
index 1f9578d4..04eb1347 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,7 +1,14 @@
 # Release notes
 
 See also the
-[unreleased changes](https://foss.heptapod.net/fluiddyn/fluidimage/-/compare/0.4.5...branch%2Fdefault).
+[unreleased changes](https://foss.heptapod.net/fluiddyn/fluidimage/-/compare/0.5.0...branch%2Fdefault).
+
+## [0.5.0] (2024-05-0?)
+
+- UVmat compatibility (launching in "local" mode).
+- Change defaults and exact meaning for parameters. `params.multipass.smoothing_coef`
+  (=2) and `params.multipass.threshold_tps` (=1.5).
+- PIV saving: use float32 and save "smooth" displacement fields.
 
 ## [0.4.6] (2024-04-20)
 
@@ -203,3 +210,4 @@ This version contains incompatible API changes documented here.
 [0.4.4]: https://foss.heptapod.net/fluiddyn/fluidimage/-/compare/0.4.3...0.4.4
 [0.4.5]: https://foss.heptapod.net/fluiddyn/fluidimage/-/compare/0.4.4...0.4.5
 [0.4.6]: https://foss.heptapod.net/fluiddyn/fluidimage/-/compare/0.4.5...0.4.6
+[0.5.0]: https://foss.heptapod.net/fluiddyn/fluidimage/-/compare/0.4.6...0.5.0
diff --git a/doc/autosum.rst b/doc/autosum.rst
index 1975abf1..446bd416 100644
--- a/doc/autosum.rst
+++ b/doc/autosum.rst
@@ -1,6 +1,8 @@
 API reference
 -------------
 
+Fluidimage contains the following subpackages
+
 .. autosummary::
    :toctree: _generated/
 
@@ -9,13 +11,29 @@ API reference
    fluidimage.data_objects
    fluidimage.works
    fluidimage.calcul
-   fluidimage.bos
-   fluidimage.optical_flow
-   fluidimage.piv
-   fluidimage.preproc
-   fluidimage.image2image
    fluidimage.calibration
    fluidimage.reconstruct
    fluidimage.postproc
    fluidimage.util
    fluidimage.gui
+
+We have also few utility modules:
+
+.. autosummary::
+   :toctree: _generated/
+
+   fluidimage.config
+   fluidimage.run_from_xml
+   fluidimage.synthetic
+   fluidimage.uvmat
+
+Finally, there are few modules to improve the API for common processing:
+
+.. autosummary::
+   :toctree: _generated/
+
+   fluidimage.bos
+   fluidimage.optical_flow
+   fluidimage.piv
+   fluidimage.preproc
+   fluidimage.image2image
diff --git a/pixi.toml b/pixi.toml
index 75eef6dd..380713ff 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -7,7 +7,7 @@ platforms = ["linux-64", "win-64", "osx-64", "osx-arm64"]
 # use as `pixi run install-editable`
 install-dependencies = "pixi install"
 install-editable = {cmd = "pip install -e . -v --no-build-isolation --no-deps", depends_on = ["install-dependencies"]}
-test = "export OMP_NUM_THREADS=1 && pytest src -v"
+test = "export OMP_NUM_THREADS=1 && pytest src -v -s"
 
 [dependencies]
 python = ">=3.9,<3.11"
diff --git a/pyproject.toml b/pyproject.toml
index fe1a6804..01cb0ac2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ build-backend = 'mesonpy'
 
 [project]
 name = "fluidimage"
-version = "0.4.6"
+version = "0.5.0"
 description = "Fluid image processing with Python."
 authors = [
     {name = "Pierre Augier", email = "pierre.augier@legi.cnrs.fr"},
diff --git a/src/fluidimage/config.py b/src/fluidimage/config.py
index 6ef94a5d..a8161e23 100644
--- a/src/fluidimage/config.py
+++ b/src/fluidimage/config.py
@@ -1,15 +1,19 @@
+"""Handle Fluidimage configuration"""
+
 import os
 from configparser import ConfigParser
 
 
 def get_config():
+    """Get configuration from .fluidimagerc"""
     config = ConfigParser()
 
     home = os.path.expanduser("~")
     path_config = os.path.join(home, ".fluidimagerc")
 
-    if os.path.exists(path_config):
-        config.read(path_config)
+    if not os.path.exists(path_config):
+        return {}
+    config.read(path_config)
 
     config_dict = {}
     for section in config.sections():
diff --git a/src/fluidimage/executors/base.py b/src/fluidimage/executors/base.py
index 3231c858..9490a86a 100644
--- a/src/fluidimage/executors/base.py
+++ b/src/fluidimage/executors/base.py
@@ -453,6 +453,7 @@ def handler_signals(signal_number, stack):
             signal.signal(12, handler_signals)
 
         self._start_processes()
+        self.nb_processes = len(self.processes)
         self._wait_for_all_processes()
         self._finalize_compute()
 
diff --git a/src/fluidimage/synthetic.py b/src/fluidimage/synthetic.py
index b62037fd..af4ca158 100644
--- a/src/fluidimage/synthetic.py
+++ b/src/fluidimage/synthetic.py
@@ -1,3 +1,5 @@
+"""Production of synthetic images"""
+
 import numpy as np
 
 
@@ -9,6 +11,7 @@ def make_synthetic_images(
     epsilon=0.0,
     part_size=np.sqrt(1 / 0.5),
 ):
+    """Produce synthetic images for testing PIV"""
     ny, nx = tuple(shape_im0)
 
     displacement_x, displacement_y = tuple(displacements)
diff --git a/src/fluidimage/topologies/piv.py b/src/fluidimage/topologies/piv.py
index 1ff84dee..51599e49 100644
--- a/src/fluidimage/topologies/piv.py
+++ b/src/fluidimage/topologies/piv.py
@@ -244,9 +244,14 @@ def make_text_at_exit(self, time_since_start):
         except AttributeError:
             nb_results = None
         if nb_results is not None and nb_results > 0:
+            try:
+                num_processes = self.executor.nb_processes
+            except AttributeError:
+                num_processes = self.executor.nb_max_workers
+            num_cores_used = min(nb_cores, num_processes)
             txt += (
                 f" ({nb_results} piv fields, {time_since_start / nb_results:.2f} s/field,"
-                f" {time_since_start * nb_cores / nb_results:.2f} s.CPU/field)."
+                f" {time_since_start * num_cores_used / nb_results:.2f} s.CPU/field)."
             )
         else:
             txt += "."