more debugging fiddled messages being ignored

1 files changed, 11 insertions, 2 deletions

diff --git a/docs/notes.md b/docs/notes.md
index acc9067..fc7c43c 100644
--- a/docs/notes.md
+++ b/docs/notes.md
@@ -142,8 +142,17 @@ source: <https://git.pipeframe.xyz/fork/melonDS>
     screen become visible again in the edit field. This includes the bottom row
     of pixels, as well as the two rows of pixels shown in the single line
     message picture.
-  - The **apparent** drawable area (including obstructed top-left corner) is
-    228x80 pixels.
+  - The drawable area (including obstructed top-left corner) is 228x80 pixels,
+    while the entire message is actually 256x80 pixels:
+
+    ![](../assets/draw-area.svg)
+
+    The above figure illustrates the area which is 'drawable' (i.e. the area in
+    which the pen tool works). Fiddled messages that go outside this area are
+    received normally, but masked slightly differently when re-sent (chunk left
+    of username label appears to be masked). The actual image data is
+    unmodified even after being forwarded by normal systems (non-fiddling
+    systems).
 
 Observed package counts (no resends) for messages of different sizes:
 |draw area|display height|packet#|