Optimized docs images and documented the process.

21 files changed, 15 insertions, 0 deletions

diff --git a/docs/internals/contributing/writing-documentation.txt b/docs/internals/contributing/writing-documentation.txt
index 1159b94c38..b203d11e4a 100644
--- a/docs/internals/contributing/writing-documentation.txt
+++ b/docs/internals/contributing/writing-documentation.txt
@@ -256,6 +256,21 @@ If a function, attribute, etc. is added, it's also okay to use a
 We can simply remove the ``.. versionadded:: A.B`` annotation without any
 indentation changes when the time comes.
 
+Minimizing images
+-----------------
+
+Optimize image compression where possible. For PNG files, use OptiPNG and
+AdvanceCOMP's ``advpng``:
+
+.. code-block:: console
+
+   $ cd docs/
+   $ optipng -o7 -zm1-9 -i0 -strip all `find . -type f -not -path "./_build/*" -name "*.png"`
+   $ advpng -z4 `find . -type f -not -path "./_build/*" -name "*.png"`
+
+This is based on OptiPNG version 0.7.5. Older versions may complain about the
+``--strip all`` option being lossy.
+
 An example
 ----------
 
diff --git a/docs/intro/_images/admin01.png b/docs/intro/_images/admin01.png
index 3196071745..35257e4b31 100644
--- a/docs/intro/_images/admin01.png
+++ b/docs/intro/_images/admin01.png
diff --git a/docs/intro/_images/admin02.png b/docs/intro/_images/admin02.png
index edca320c3a..7f3fa5d4a4 100644
--- a/docs/intro/_images/admin02.png
+++ b/docs/intro/_images/admin02.png
diff --git a/docs/intro/_images/admin03t.png b/docs/intro/_images/admin03t.png
index 550cbf010c..eb3f378a9d 100644
--- a/docs/intro/_images/admin03t.png
+++ b/docs/intro/_images/admin03t.png
diff --git a/docs/intro/_images/admin04t.png b/docs/intro/_images/admin04t.png
index 854fbc72f9..53a1023750 100644
--- a/docs/intro/_images/admin04t.png
+++ b/docs/intro/_images/admin04t.png
diff --git a/docs/intro/_images/admin05t.png b/docs/intro/_images/admin05t.png
index 9106251d64..fc6f5ceb62 100644
--- a/docs/intro/_images/admin05t.png
+++ b/docs/intro/_images/admin05t.png
diff --git a/docs/intro/_images/admin06t.png b/docs/intro/_images/admin06t.png
index e200673c68..80953f4060 100644
--- a/docs/intro/_images/admin06t.png
+++ b/docs/intro/_images/admin06t.png
diff --git a/docs/intro/_images/admin07.png b/docs/intro/_images/admin07.png
index 58f41c02d6..9125cfd6c6 100644
--- a/docs/intro/_images/admin07.png
+++ b/docs/intro/_images/admin07.png
diff --git a/docs/intro/_images/admin08t.png b/docs/intro/_images/admin08t.png
index eb2a2b120c..293757dbe0 100644
--- a/docs/intro/_images/admin08t.png
+++ b/docs/intro/_images/admin08t.png
diff --git a/docs/intro/_images/admin09.png b/docs/intro/_images/admin09.png
index 0f8011b5a5..bfaeb3b99f 100644
--- a/docs/intro/_images/admin09.png
+++ b/docs/intro/_images/admin09.png
diff --git a/docs/intro/_images/admin10t.png b/docs/intro/_images/admin10t.png
index ad888bd3f0..928cad5d6e 100644
--- a/docs/intro/_images/admin10t.png
+++ b/docs/intro/_images/admin10t.png
diff --git a/docs/intro/_images/admin11t.png b/docs/intro/_images/admin11t.png
index c51dbdb0b8..a5e9bb12cf 100644
--- a/docs/intro/_images/admin11t.png
+++ b/docs/intro/_images/admin11t.png
diff --git a/docs/intro/_images/admin12t.png b/docs/intro/_images/admin12t.png
index a55df306c9..18eae09007 100644
--- a/docs/intro/_images/admin12t.png
+++ b/docs/intro/_images/admin12t.png
diff --git a/docs/intro/_images/admin13t.png b/docs/intro/_images/admin13t.png
index 25ddc39e4d..382f89b958 100644
--- a/docs/intro/_images/admin13t.png
+++ b/docs/intro/_images/admin13t.png
diff --git a/docs/intro/_images/admin14t.png b/docs/intro/_images/admin14t.png
index 3371457ba4..47f2323c7c 100644
--- a/docs/intro/_images/admin14t.png
+++ b/docs/intro/_images/admin14t.png
diff --git a/docs/ref/contrib/admin/_images/actions-as-modeladmin-methods.png b/docs/ref/contrib/admin/_images/actions-as-modeladmin-methods.png
index b9a2d097d6..d29f008e9f 100644
--- a/docs/ref/contrib/admin/_images/actions-as-modeladmin-methods.png
+++ b/docs/ref/contrib/admin/_images/actions-as-modeladmin-methods.png
diff --git a/docs/ref/contrib/admin/_images/adding-actions-to-the-modeladmin.png b/docs/ref/contrib/admin/_images/adding-actions-to-the-modeladmin.png
index 02d69ab715..6e394288a4 100644
--- a/docs/ref/contrib/admin/_images/adding-actions-to-the-modeladmin.png
+++ b/docs/ref/contrib/admin/_images/adding-actions-to-the-modeladmin.png
diff --git a/docs/ref/contrib/admin/_images/admin-actions.png b/docs/ref/contrib/admin/_images/admin-actions.png
index b3035f95e2..7aefcfe043 100644
--- a/docs/ref/contrib/admin/_images/admin-actions.png
+++ b/docs/ref/contrib/admin/_images/admin-actions.png
diff --git a/docs/ref/contrib/admin/_images/fieldsets.png b/docs/ref/contrib/admin/_images/fieldsets.png
index abb293c2d5..a52ec0d41b 100644
--- a/docs/ref/contrib/admin/_images/fieldsets.png
+++ b/docs/ref/contrib/admin/_images/fieldsets.png
diff --git a/docs/ref/contrib/admin/_images/list_filter.png b/docs/ref/contrib/admin/_images/list_filter.png
index 381c144237..de0a746cfe 100644
--- a/docs/ref/contrib/admin/_images/list_filter.png
+++ b/docs/ref/contrib/admin/_images/list_filter.png
diff --git a/docs/ref/contrib/admin/_images/raw_id_fields.png b/docs/ref/contrib/admin/_images/raw_id_fields.png
index 7d927d3fa6..e8ff489265 100644
--- a/docs/ref/contrib/admin/_images/raw_id_fields.png
+++ b/docs/ref/contrib/admin/_images/raw_id_fields.png