[gnome-user-docs] Picture requirements addded to login.logo.page

[Jana Svarova <jsvarova src gnome org>]

commit 6c54f9d50a69a565185793e0d292a9b643304804
Author: Jana Svarova <jsvarova redhat com>
Date:   Mon Jul 14 14:05:00 2014 +0200

    Picture requirements addded to login.logo.page

 system-admin-guide/C/login-logo.page |   12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)
---
diff --git a/system-admin-guide/C/login-logo.page b/system-admin-guide/C/login-logo.page
index b7ba5ea..a4b4c46 100644
--- a/system-admin-guide/C/login-logo.page
+++ b/system-admin-guide/C/login-logo.page
@@ -46,7 +46,17 @@
   GSettings key. Since <sys>GDM</sys> uses its own
   <sys>dconf</sys> profile, you can add a greeter logo by changing
   the settings in that profile.</p>
-
+  <p>When choosing an appropriate picture for the logo to your login screen, 
+  consider the following picture requirements:</p>
+  <list>
+       <item><p>All the major formats are supported: ANI, BPM, GIF, ICNS, ICO, 
+       JPEG, JPEG 2000,   PCX, PNM, PBM, PGM, PPM, GTIFF, RAS, TGA, TIFF, XBM, 
+       WBMP, XPM, and SVG. </p></item>
+       <item><p>The size of the picture scales proportionally to the height of 
+       48 pixels. So, if you set the logo to 1920x1080, for example, it changes 
+       into an 85x48 thumbnail of the original picture. </p></item>
+  </list>
+  
 <steps>
   <title>Set the org.gnome.login-screen.logo key</title>
   <item><p>Create a <sys>gdm</sys> database for machine-wide settings in