diff --git a/docs/graphics-protocol.rst b/docs/graphics-protocol.rst
index 6ce593743..1ad7b4f23 100644
--- a/docs/graphics-protocol.rst
+++ b/docs/graphics-protocol.rst
@@ -697,7 +697,7 @@ take, and the default value they take when missing. All integers are 32-bit.
 Key      Value                 Default    Description
 =======  ====================  =========  =================
 ``a``    Single character.     ``t``      The overall action this graphics command is performing.
-         ``(a, c, d, f, `                 ``t`` - transmit data, ``T`` - transmit data and display image,
+         ``(a, c, d, f, ``                ``t`` - transmit data, ``T`` - transmit data and display image,
          ``p, q, t, T)``                  ``q`` - query terminal, ``p`` - put (display) previous transmitted image,
                                           ``d`` - delete image, ``f`` - transmit data for animation frames,
                                           ``a`` - control animation, ``c`` - compose animation frames
diff --git a/kittens/tui/images.py b/kittens/tui/images.py
index 348f7e603..bfddf6c2c 100644
--- a/kittens/tui/images.py
+++ b/kittens/tui/images.py
@@ -18,7 +18,8 @@ from typing import (
 from kitty.conf.utils import positive_float, positive_int
 from kitty.fast_data_types import create_canvas
 from kitty.typing import (
-    CompletedProcess, GRT_a, GRT_d, GRT_f, GRT_m, GRT_o, GRT_t, HandlerType
+    GRT_C, CompletedProcess, GRT_a, GRT_d, GRT_f, GRT_m, GRT_o, GRT_t,
+    HandlerType
 )
 from kitty.utils import ScreenSize, find_exe, fit_image
 
@@ -313,7 +314,7 @@ class GraphicsCommand:
     I: int = 0        # image number
     p: int = 0        # placement id
     o: Optional[GRT_o] = None  # type of compression
-    m: GRT_m = 0    # 0 or 1 whether there is more chunked data
+    m: GRT_m = 0      # 0 or 1 whether there is more chunked data
     x: int = 0        # left edge of image area to display
     y: int = 0        # top edge of image area to display
     w: int = 0        # image width to display
@@ -323,7 +324,268 @@ class GraphicsCommand:
     c: int = 0        # number of cols to display image over
     r: int = 0        # number of rows to display image over
     z: int = 0        # z-index
-    d: GRT_d = 'a'  # what to delete
+    C: GRT_C = 0      # cursor movement policy/composition mode
+    d: GRT_d = 'a'    # what to delete
+
+    @property
+    def action(self) -> GRT_a:
+        return self.a
+
+    @action.setter
+    def action(self, val: GRT_a) -> None:
+        self.a = val
+
+    @property
+    def transmission_type(self) -> GRT_t:
+        return self.t
+
+    @transmission_type.setter
+    def transmission_type(self, val: GRT_t) -> None:
+        self.t = val
+
+    @property
+    def compressed(self) -> Optional[GRT_o]:
+        return self.o
+
+    @compressed.setter
+    def compressed(self, val: Optional[GRT_o]) -> None:
+        self.o = val
+
+    @property
+    def delete_action(self) -> Optional[GRT_d]:
+        return self.d
+
+    @delete_action.setter
+    def delete_action(self, val: GRT_d) -> None:
+        self.d = val
+
+    @delete_action.setter
+    def delete_action(self, val: GRT_d) -> None:
+        self.d = val
+
+    @property
+    def format(self) -> GRT_f:
+        return self.f
+
+    @format.setter
+    def format(self, val: GRT_f) -> None:
+        self.f = val
+
+    @property
+    def more(self) -> GRT_m:
+        return self.m
+
+    @more.setter
+    def more(self, val: GRT_m) -> None:
+        self.m = val
+
+    @property
+    def image_id(self) -> int:
+        return self.i
+
+    @image_id.setter
+    def image_id(self, val: int) -> None:
+        self.i = val
+
+    @property
+    def image_number(self) -> int:
+        return self.I
+
+    @image_number.setter
+    def image_number(self, val: int) -> None:
+        self.I = val  # noqa
+
+    @property
+    def placement_id(self) -> int:
+        return self.p
+
+    @placement_id.setter
+    def placement_id(self, val: int) -> None:
+        self.p = val
+
+    @property
+    def data_size(self) -> int:
+        return self.S
+
+    @data_size.setter
+    def data_size(self, val: int) -> None:
+        self.S = val
+
+    @property
+    def data_offset(self) -> int:
+        return self.O
+
+    @data_offset.setter
+    def data_offset(self, val: int) -> None:
+        self.O = val  # noqa
+
+    @property
+    def quiet(self) -> int:
+        return self.q
+
+    @quiet.setter
+    def quiet(self, val: int) -> None:
+        self.q = val
+
+    @property
+    def width(self) -> int:
+        return self.w
+
+    @width.setter
+    def width(self, val: int) -> None:
+        self.w = val
+
+    @property
+    def height(self) -> int:
+        return self.h
+
+    @height.setter
+    def height(self, val: int) -> None:
+        self.h = val
+
+    @property
+    def left_edge(self) -> int:
+        return self.x
+
+    @left_edge.setter
+    def left_edge(self, val: int) -> None:
+        self.x = val
+
+    @property
+    def top_edge(self) -> int:
+        return self.y
+
+    @top_edge.setter
+    def top_edge(self, val: int) -> None:
+        self.y = val
+
+    @property
+    def cursor_movement(self) -> GRT_C:
+        return self.C
+
+    @cursor_movement.setter
+    def cursor_movement(self, val: GRT_C) -> None:
+        self.C = val
+
+    @property
+    def compose_mode(self) -> GRT_C:
+        return self.C
+
+    @compose_mode.setter
+    def compose_mode(self, val: GRT_C) -> None:
+        self.C = val
+
+    @property
+    def cell_x_offset(self) -> int:
+        return self.X
+
+    @cell_x_offset.setter
+    def cell_x_offset(self, val: int) -> None:
+        self.X = val
+
+    @property
+    def blend_mode(self) -> int:
+        return self.X
+
+    @blend_mode.setter
+    def blend_mode(self, val: int) -> None:
+        self.X = val
+
+    @property
+    def cell_y_offset(self) -> int:
+        return self.Y
+
+    @cell_y_offset.setter
+    def cell_y_offset(self, val: int) -> None:
+        self.Y = val
+
+    @property
+    def bgcolor(self) -> int:
+        return self.Y
+
+    @bgcolor.setter
+    def bgcolor(self, val: int) -> None:
+        self.Y = val
+
+    @property
+    def data_width(self) -> int:
+        return self.s
+
+    @data_width.setter
+    def data_width(self, val: int) -> None:
+        self.s = val
+
+    @property
+    def animation_state(self) -> int:
+        return self.s
+
+    @animation_state.setter
+    def animation_state(self, val: int) -> None:
+        self.s = val
+
+    @property
+    def data_height(self) -> int:
+        return self.v
+
+    @data_height.setter
+    def data_height(self, val: int) -> None:
+        self.v = val
+
+    @property
+    def loop_count(self) -> int:
+        return self.v
+
+    @loop_count.setter
+    def loop_count(self, val: int) -> None:
+        self.v = val
+
+    @property
+    def num_lines(self) -> int:
+        return self.r
+
+    @num_lines.setter
+    def num_lines(self, val: int) -> None:
+        self.r = val
+
+    @property
+    def frame_number(self) -> int:
+        return self.r
+
+    @frame_number.setter
+    def frame_number(self, val: int) -> None:
+        self.r = val
+
+    @property
+    def num_cells(self) -> int:
+        return self.c
+
+    @num_cells.setter
+    def num_cells(self, val: int) -> None:
+        self.c = val
+
+    @property
+    def other_frame_number(self) -> int:
+        return self.c
+
+    @other_frame_number.setter
+    def other_frame_number(self, val: int) -> None:
+        self.c = val
+
+    @property
+    def z_index(self) -> int:
+        return self.z
+
+    @z_index.setter
+    def z_index(self, val: int) -> None:
+        self.z = val
+
+    @property
+    def gap(self) -> int:
+        return self.z
+
+    @gap.setter
+    def gap(self, val: int) -> None:
+        self.z = val
 
     def __repr__(self) -> str:
         return self.serialize().decode('ascii').replace('\033', '^]')
@@ -359,6 +621,23 @@ class GraphicsCommand:
             defval: Union[str, None, int] = getattr(GraphicsCommand, k)
             setattr(self, k, defval)
 
+    def iter_transmission_chunks(self, data: bytes, level: int = -1, compression_threshold: int = 1024) -> Iterator[bytes]:
+        gc = self.clone()
+        gc.S = len(data)
+        if level and len(data) >= compression_threshold:
+            import zlib
+            compressed = zlib.compress(data, level)
+            if len(compressed) < len(data):
+                gc.o = 'z'
+                data = compressed
+                gc.S = len(data)
+        data = standard_b64encode(data)
+        while data:
+            chunk, data = data[:4096], data[4096:]
+            gc.m = 1 if data else 0
+            yield gc.serialize(chunk)
+            gc.clear()
+
 
 class Placement:
     cmd: GraphicsCommand
diff --git a/kitty/rgb.py b/kitty/rgb.py
index 881ee56f8..53733878e 100644
--- a/kitty/rgb.py
+++ b/kitty/rgb.py
@@ -8,9 +8,9 @@ from typing import Optional, NamedTuple
 
 
 class Color(NamedTuple):
-    red: int
-    green: int
-    blue: int
+    red: int = 0
+    green: int = 0
+    blue: int = 0
 
     def luminance(self) -> float:
         return 0.299 * self.red + 0.587 * self.green + 0.114 * self.blue
@@ -25,6 +25,11 @@ class Color(NamedTuple):
     def __int__(self) -> int:
         return self.red << 16 | self.green << 8 | self.blue
 
+    def as_bytearray(self, alpha: Optional[int] = None) -> bytearray:
+        if alpha is None:
+            return bytearray((self.red, self.green, self.blue))
+        return bytearray((self.red, self.green, self.blue, alpha))
+
 
 def alpha_blend_channel(top_color: int, bottom_color: int, alpha: float) -> int:
     return int(alpha * top_color + (1 - alpha) * bottom_color)
diff --git a/kitty/typing.py b/kitty/typing.py
index e2b0c170e..62db96ba2 100644
--- a/kitty/typing.py
+++ b/kitty/typing.py
@@ -11,7 +11,7 @@ AddressFamily = PopenType = Socket = StartupCtx = None
 SessionTab = SessionType = LayoutType = SpecialWindowInstance = None
 MarkType = RemoteCommandType = CoreTextFont = FontConfigPattern = None
 KeyEventType = ImageManagerType = KittyCommonOpts = HandlerType = None
-GRT_t = GRT_a = GRT_d = GRT_f = GRT_m = GRT_o = None
+GRT_t = GRT_a = GRT_d = GRT_f = GRT_m = GRT_o = GRT_C = None
 ScreenSize = KittensKeyActionType = MouseEvent = AbstractEventLoop = None
 TermManagerType = LoopType = Debug = GraphicsCommandType = None
 
diff --git a/kitty/typing.pyi b/kitty/typing.pyi
index 2e325dbde..19a20aa3d 100644
--- a/kitty/typing.pyi
+++ b/kitty/typing.pyi
@@ -37,11 +37,12 @@ from .window import Window as WindowType
 EdgeLiteral = Literal['left', 'top', 'right', 'bottom']
 MatchType = Literal['mime', 'ext', 'protocol', 'file', 'path', 'url', 'fragment_matches']
 PowerlineStyle = Literal['angled', 'slanted', 'round']
-GRT_a = Literal['t', 'T', 'q', 'p', 'd', 'f', 'a']
+GRT_a = Literal['t', 'T', 'q', 'p', 'd', 'f', 'a', 'c', 'q']
 GRT_f = Literal[24, 32, 100]
 GRT_t = Literal['d', 'f', 't', 's']
 GRT_o = Literal['z']
 GRT_m = Literal[0, 1]
+GRT_C = Literal[0, 1]
 GRT_d = Literal['a', 'A', 'c', 'C', 'i', 'I', 'p', 'P', 'q', 'Q', 'x', 'X', 'y', 'Y', 'z', 'Z', 'f', 'F']