diff --git a/SCHEMA.md b/SCHEMA.md
index 02156c79..70bdb74b 100644
--- a/SCHEMA.md
+++ b/SCHEMA.md
@@ -44,4 +44,4 @@ The Exception to this are themed images. C for Christmas, H for Halloween, and X
 * Nude, exposed bust and pubic region
 
 ### Number
-When there's multiple images with all the previous tags being identical, mainly for ungrouped images.
\ No newline at end of file
+Optional, use when there's multiple images with all the previous tags being identical, mainly for ungrouped images.
\ No newline at end of file