Index: config/defaults.inc.php
===================================================================
--- a/config/defaults.inc.php
+++ b/config/defaults.inc.php
@@ -481,4 +481,8 @@
 // 4 - one identity with possibility to edit only signature
 $config['identities_level'] = 0;
+
+// Maximum size of uploaded image in kilobytes
+// Images (in html signatures) are stored in database as data URIs
+$config['identity_image_size'] = 64;
 
 // Mimetypes supported by the browser.