diff --git a/NeoBitmapFile-object.md b/NeoBitmapFile-object.md
index 4839b40..6df92d5 100644
--- a/NeoBitmapFile-object.md
+++ b/NeoBitmapFile-object.md
@@ -1,5 +1,7 @@
 [NeoBitmapFile object API](https://github.com/Makuna/NeoPixelBus/wiki/NeoBitmapFile-object-API)
 
+**NOTE:**  Parts of the description below are out of date, specifically around using BLT and rendering.  Please refer to the API and examples for exactness until this area is updated.
+
 The NeoBitmapFile is image file reference object. As pixels are rendered it will retrieve them from the file thus saving memory.
 
 It provides direct x,y access to get pixels along with a render method  `Blt()`  that will copy bits to the NeoPixelBus or other Raster objects.