diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
index c5651c6..7a4fed6 100644
--- a/RELEASE-NOTES.md
+++ b/RELEASE-NOTES.md
@@ -59,7 +59,8 @@ Text and Graphics files with the correct file types can be previewed
 without leaving DeskTop; select the file icon then select File > Open,
 or double-click the file icon. Text files must be type TXT ($04).
 Graphics files must be type FOT ($08), or BIN ($06) with an aux type
-of $2000 (hi-res/double hi-res) or $5800 (Minipix a.k.a. Print Shop).
+of $2000 and 17 or 33 blocks (hi-res/double hi-res) or $5800 and 3 blocks
+(Minipix a.k.a. Print Shop).
 
 To preview files of other types, you can copy the preview handlers
 named `SHOW.TEXT.FILE` and `SHOW.IMAGE.FILE` from the `PREVIEW` folder