diff --git a/docs/handbook/image-file-formats.rst b/docs/handbook/image-file-formats.rst
index 31adcb142..34839caaa 100644
--- a/docs/handbook/image-file-formats.rst
+++ b/docs/handbook/image-file-formats.rst
@@ -332,6 +332,14 @@ The :py:meth:`~PIL.Image.Image.open` method sets the following
     Transparency color index. This key is omitted if the image is not a
     transparent palette image.
 
+``Open`` also sets ``Image.text`` to a list of the values of the
+``tEXt``, ``zTXt``, and ``iTXt`` chunks of the PNG image. Individual
+compressed chunks are limited to a decompressed size of
+``PngImagePlugin.MAX_TEXT_CHUNK``, by default 1MB, to prevent
+decompression bombs. Additionally, the total size of all of the text
+chunks is limited to ``PngImagePlugin.MAX_TEXT_MEMORY``, defaulting to
+64MB.
+
 The :py:meth:`~PIL.Image.Image.save` method supports the following options:
 
 **optimize**