diff --git a/docs/graphics-protocol.rst b/docs/graphics-protocol.rst
index 872fafaa4..c49b535e6 100644
--- a/docs/graphics-protocol.rst
+++ b/docs/graphics-protocol.rst
@@ -330,12 +330,13 @@ sequence of escape codes to the terminal emulator::
     <ESC>_Gm=0;<encoded pixel data last chunk><ESC>\
 
 Note that only the first escape code needs to have the full set of control
-codes such as width, height, format etc. Subsequent chunks **must** have
-only the ``m`` key. The client **must** finish sending all chunks for a single image
-before sending any other graphics related escape codes. Note that the cursor
-position used to display the image **must** be the position when the final chunk is
-received. Finally, terminals must not display anything, until the entire sequence is
-received and validated.
+codes such as width, height, format, etc. Subsequent chunks **must** have only
+the ``m`` and optionally ``q`` keys. When sending animation frame data, subsequent
+chunks must also specify the ``a=f`` key. The client **must** finish sending
+all chunks for a single image before sending any other graphics related escape
+codes. Note that the cursor position used to display the image **must** be the
+position when the final chunk is received. Finally, terminals must not display
+anything, until the entire sequence is received and validated.
 
 
 Querying support and available transmission mediums