diff --git a/NewHorizons/Schemas/shiplog_schema.xsd b/NewHorizons/Schemas/shiplog_schema.xsd
index 1c68acde..213cc157 100644
--- a/NewHorizons/Schemas/shiplog_schema.xsd
+++ b/NewHorizons/Schemas/shiplog_schema.xsd
@@ -81,7 +81,7 @@
             <xs:element name="AltPhotoCondition" type="xs:string" minOccurs="0" maxOccurs="1">
                 <xs:annotation>
                     <xs:documentation>
-                        If this fact is revealed, show the Alt picture
+                        If this fact is revealed, show the Alt picture. Alt photos use the same file name as default but suffixed with "_alt"
                     </xs:documentation>
                 </xs:annotation>
             </xs:element>