diff --git a/doc/source/configuration.rst b/doc/source/configuration.rst
index 2d0c894..6745614 100644
--- a/doc/source/configuration.rst
+++ b/doc/source/configuration.rst
@@ -689,6 +689,24 @@
 
     ENABLE_IDENTITY_V2=False
 
+
+Glance
+++++++
+
+The default image size quota of 1GiB may be too small if larger images
+are to be used. Change the default at setup time with:
+
+::
+
+    GLANCE_LIMIT_IMAGE_SIZE_TOTAL=5000
+
+or at runtime via:
+
+::
+
+    openstack --os-cloud devstack-system-admin registered limit update \
+      --service glance --default-limit 5000 --region RegionOne image_size_total
+
 .. _arch-configuration:
 
 Architectures