diff --git a/displayarray/__main__.py b/displayarray/__main__.py
index 4292906..9938d50 100644
--- a/displayarray/__main__.py
+++ b/displayarray/__main__.py
@@ -1,5 +1,6 @@
 """
 DisplayArray.
+
 Display NumPy arrays.
 
 Usage:
@@ -25,6 +26,7 @@ import asyncio
 
 
 def main(argv=None):
+    """Process command line arguments."""
     arguments = docopt(__doc__, argv=argv)
     if arguments["--version"]:
         from displayarray import __version__
diff --git a/displayarray/uid.py b/displayarray/_uid.py
similarity index 93%
rename from displayarray/uid.py
rename to displayarray/_uid.py
index f64b6df..742503c 100644
--- a/displayarray/uid.py
+++ b/displayarray/_uid.py
@@ -1,3 +1,5 @@
+"""Generate unique IDs for videos."""
+
 from collections.abc import Hashable
 
 
diff --git a/displayarray/util.py b/displayarray/_util.py
similarity index 90%
rename from displayarray/util.py
rename to displayarray/_util.py
index cb4eff6..27e37ed 100644
--- a/displayarray/util.py
+++ b/displayarray/_util.py
@@ -1,3 +1,5 @@
+"""Functions needed to deal with OpenCV."""
+
 import weakref
 
 
diff --git a/displayarray/callbacks.py b/displayarray/callbacks.py
index de728ca..0e2586c 100644
--- a/displayarray/callbacks.py
+++ b/displayarray/callbacks.py
@@ -1,3 +1,5 @@
+"""Standard callbacks to use on incoming frames."""
+
 from displayarray.window import window_commands
 import numpy as np
 
@@ -35,7 +37,7 @@ class function_display_callback(object):  # NOSONAR
     """
 
     def __init__(self, display_function, finish_function=None):
-
+        """Run display_function on frames."""
         self.looping = True
         self.first_call = True
 
diff --git a/displayarray/effects/__init__.py b/displayarray/effects/__init__.py
index e69de29..2885141 100644
--- a/displayarray/effects/__init__.py
+++ b/displayarray/effects/__init__.py
@@ -0,0 +1 @@
+"""Effects to run on numpy arrays to make data clearer."""
diff --git a/displayarray/effects/crop.py b/displayarray/effects/crop.py
index d861075..ae18e32 100644
--- a/displayarray/effects/crop.py
+++ b/displayarray/effects/crop.py
@@ -1,11 +1,26 @@
+"""Crop any n-dimensional array."""
+
 import numpy as np
-from ..input import mouse_loop
+from displayarray.input import mouse_loop
 
 
 class Crop(object):
-    """A callback class that will return the input array cropped to the output size. N-dimensional."""
+    """
+    A callback class that will return the input array cropped to the output size. N-dimensional.
+
+    >>> crop_it = Crop((2,2,2))
+    >>> arr = np.ones((4,4,4))
+    >>> crop_it(arr)
+    array([[[1., 1.],
+            [1., 1.]],
+    <BLANKLINE>
+           [[1., 1.],
+            [1., 1.]]])
+
+    """
 
     def __init__(self, output_size=(64, 64, 3), center=None):
+        """Create the cropper."""
         self._output_size = None
         self._center = None
         self.odd_center = None
@@ -17,20 +32,24 @@ class Crop(object):
 
     @property
     def output_size(self):
+        """Get the output size after cropping."""
         return self._output_size
 
     @output_size.setter
     def output_size(self, set):
+        """Set what the output size will be after cropping."""
         self._output_size = set
         if self._output_size is not None:
             self._output_size = np.asarray(set)
 
     @property
     def center(self):
+        """Get center crop position on the input."""
         return self._center
 
     @center.setter
     def center(self, set):
+        """Set center crop position on the input."""
         self._center = set
         if self._center is not None:
             self._center = np.asarray(set)
@@ -87,7 +106,7 @@ class Crop(object):
         return out_array.astype(arr.dtype)
 
     def enable_mouse_control(self):
-        """Move the mouse to move where the crop is from on the original image"""
+        """Move the mouse to move where the crop is from on the original image."""
 
         @mouse_loop
         def m_loop(me):
diff --git a/displayarray/effects/lens.py b/displayarray/effects/lens.py
index 1038c81..5dc8278 100644
--- a/displayarray/effects/lens.py
+++ b/displayarray/effects/lens.py
@@ -1,9 +1,11 @@
+"""Create lens effects. Currently only 2D+color arrays are supported."""
+
 import numpy as np
-from ..input import mouse_loop
+from displayarray.input import mouse_loop
 import cv2
 
 
-class ControllableLens(object):
+class _ControllableLens(object):
     def __init__(self, use_bleed=False, zoom=1, center=None):
         self.center = center
         self.zoom = zoom
@@ -22,10 +24,66 @@ class ControllableLens(object):
         ) / 2
 
 
-class Barrel(ControllableLens):
-    def __init__(
-        self, use_bleed=False, barrel_power=1, pincushion_power=1, zoom=1, center=None
-    ):
+class Barrel(_ControllableLens):
+    """
+    Create a barrel distortion.
+
+    >>> distort_it = Barrel(zoom=1, barrel_power=1.5)
+    >>> x = np.linspace(0, 1, 4)
+    >>> y = np.linspace(0, 1, 4)
+    >>> c = np.linspace(0, 1, 2)
+    >>> arrx, arry, arrc = np.meshgrid(x,y,c)
+    >>> arrx
+    array([[[0.        , 0.        ],
+            [0.33333333, 0.33333333],
+            [0.66666667, 0.66666667],
+            [1.        , 1.        ]],
+    <BLANKLINE>
+           [[0.        , 0.        ],
+            [0.33333333, 0.33333333],
+            [0.66666667, 0.66666667],
+            [1.        , 1.        ]],
+    <BLANKLINE>
+           [[0.        , 0.        ],
+            [0.33333333, 0.33333333],
+            [0.66666667, 0.66666667],
+            [1.        , 1.        ]],
+    <BLANKLINE>
+           [[0.        , 0.        ],
+            [0.33333333, 0.33333333],
+            [0.66666667, 0.66666667],
+            [1.        , 1.        ]]])
+
+    >>> distort_it(arrx)
+    array([[[0.33333333, 0.33333333],
+            [0.33333333, 0.33333333],
+            [0.66666667, 0.66666667],
+            [0.66666667, 0.66666667]],
+    <BLANKLINE>
+           [[0.33333333, 0.33333333],
+            [0.33333333, 0.33333333],
+            [0.66666667, 0.66666667],
+            [0.66666667, 0.66666667]],
+    <BLANKLINE>
+           [[0.33333333, 0.33333333],
+            [0.33333333, 0.33333333],
+            [0.66666667, 0.66666667],
+            [0.66666667, 0.66666667]],
+    <BLANKLINE>
+           [[0.33333333, 0.33333333],
+            [0.33333333, 0.33333333],
+            [0.66666667, 0.66666667],
+            [0.66666667, 0.66666667]]])
+
+    :param zoom: How far to zoom into the array
+    :param barrel_power: How much to distort.
+                         1 = no distortion. >1 increases size of center. 0<x<1 increases peripheral.
+    :param center: Center to apply the distortion at on the source image.
+    :param use_bleed: Fill in black regions with previos frame values. Shouldn't be neccesary in most cases.
+    """
+
+    def __init__(self, zoom=1, barrel_power=1, center=None, use_bleed=False):
+        """Create the distorter."""
         super().__init__(use_bleed, zoom, center)
         self.center = center
         self.zoom = zoom
@@ -36,7 +94,9 @@ class Barrel(ControllableLens):
 
     def enable_mouse_control(self):
         """
-        Move the mouse to center the image, scroll to increase/decrease barrel, ctrl+scroll to increase/decrease zoom
+        Enable mouse control.
+
+        Move the mouse to center the image, scroll to increase/decrease barrel, ctrl+scroll to increase/decrease zoom.
         """
 
         @mouse_loop
@@ -58,6 +118,7 @@ class Barrel(ControllableLens):
         return self
 
     def __call__(self, arr):
+        """Run the distortion on an array."""
         zoom_out = 1.0 / self.zoom
         self.check_setup_bleed(arr)
 
@@ -102,10 +163,13 @@ class Barrel(ControllableLens):
         return arr
 
 
-class Mustache(ControllableLens):
+class Mustache(_ControllableLens):
+    """Create a mustache distortion."""
+
     def __init__(
         self, use_bleed=False, barrel_power=1, pincushion_power=1, zoom=1, center=None
     ):
+        """Create the distorter."""
         super().__init__(use_bleed, zoom, center)
         self.center = center
         self.zoom = zoom
@@ -116,6 +180,15 @@ class Mustache(ControllableLens):
         self.mouse_control = None
 
     def enable_mouse_control(self):
+        """
+        Enable mouse control.
+
+        Move the mouse to center the image.
+        Scroll to increase/decrease barrel.
+        Ctrl+scroll to increase/decrease zoom.
+        Shift+Scroll to increase/decrease pincushion.
+        """
+
         @mouse_loop
         def m_loop(me):
             self.center[:] = [me.y, me.x]
@@ -139,6 +212,7 @@ class Mustache(ControllableLens):
         self.mouse_control = m_loop
 
     def __call__(self, arr):
+        """Run the distortion on an array."""
         zoom_out = 1.0 / self.zoom
         self.check_setup_bleed(arr)
 
diff --git a/displayarray/effects/select_channels.py b/displayarray/effects/select_channels.py
index bcdc358..8df894d 100644
--- a/displayarray/effects/select_channels.py
+++ b/displayarray/effects/select_channels.py
@@ -1,10 +1,21 @@
+"""Reduce many color images to the three colors that your eyeballs can see."""
+
 import numpy as np
 from ..input import mouse_loop
 import cv2
 
+from typing import Iterable
+
 
 class SelectChannels(object):
-    def __init__(self, selected_channels=None):
+    """
+    Select channels to display from an array with too many colors.
+
+    :param selected_channels: the list of channels to display.
+    """
+
+    def __init__(self, selected_channels: Iterable[int] = None):
+        """Select which channels from the input array to display in the output."""
         if selected_channels is None:
             selected_channels = [0, 0, 0]
         self.selected_channels = selected_channels
@@ -13,6 +24,7 @@ class SelectChannels(object):
         self.num_input_channels = None
 
     def __call__(self, arr):
+        """Run the channel selector."""
         self.num_input_channels = arr.shape[-1]
         out_arr = [
             arr[..., min(max(0, x), arr.shape[-1] - 1)] for x in self.selected_channels
@@ -21,6 +33,14 @@ class SelectChannels(object):
         return out_arr
 
     def enable_mouse_control(self):
+        """
+        Enable mouse control.
+
+        Alt+Scroll to increase/decrease channel 2.
+        Shift+Scroll to increase/decrease channel 1.
+        Ctrl+scroll to increase/decrease channel 0.
+        """
+
         @mouse_loop
         def m_loop(me):
             if me.event == cv2.EVENT_MOUSEWHEEL:
diff --git a/displayarray/frame/frame_publishing.py b/displayarray/frame/frame_publishing.py
index 654b7ad..cbb5ba9 100644
--- a/displayarray/frame/frame_publishing.py
+++ b/displayarray/frame/frame_publishing.py
@@ -1,4 +1,5 @@
-import sys
+"""Publish frames so any function within this program can find them."""
+
 import threading
 import time
 import asyncio
@@ -8,7 +9,7 @@ import numpy as np
 
 from displayarray.frame import subscriber_dictionary
 from .np_to_opencv import NpCam
-from displayarray.uid import uid_for_source
+from displayarray._uid import uid_for_source
 
 from typing import Union, Tuple, Optional, Dict, Any, List, Callable
 
@@ -113,6 +114,7 @@ async def publish_updates_zero_mq(
     copy=True,
     track=False
 ):
+    """Publish frames to ZeroMQ when they're updated."""
     import zmq
     from displayarray import read_updates
 
@@ -160,6 +162,7 @@ async def publish_updates_ros(
     rate_hz=None,
     dtype=None
 ):
+    """Publish frames to ROS when they're updated."""
     import rospy
     from rospy.numpy_msg import numpy_msg
     import std_msgs.msg
diff --git a/displayarray/frame/frame_updater.py b/displayarray/frame/frame_updater.py
index 7c261c4..b149ac8 100644
--- a/displayarray/frame/frame_updater.py
+++ b/displayarray/frame/frame_updater.py
@@ -1,3 +1,5 @@
+"""Get and handle updated frames."""
+
 import threading
 import asyncio
 from typing import Union, Tuple, Any, Callable, List, Optional, Dict
@@ -5,7 +7,7 @@ from typing import Union, Tuple, Any, Callable, List, Optional, Dict
 import numpy as np
 
 from displayarray.callbacks import global_cv_display_callback
-from displayarray.uid import uid_for_source
+from displayarray._uid import uid_for_source
 from displayarray.frame import subscriber_dictionary
 from displayarray.frame.frame_publishing import pub_cam_thread
 from displayarray.window import window_commands
@@ -26,6 +28,7 @@ class FrameUpdater(threading.Thread):
         high_speed: bool = True,
         fps_limit: float = 240,
     ):
+        """Create the frame updater thread."""
         super(FrameUpdater, self).__init__(target=self.loop, args=())
         self.cam_id = uid_for_source(video_source)
         self.video_source = video_source
@@ -126,7 +129,8 @@ async def read_updates(
     end_callback: Callable[[], bool] = lambda: False,
     blocking=True,
 ):
-    """Reads back all updates from the requested videos.
+    """
+    Read back all updates from the requested videos.
 
     Example usage:
     >>> from examples.videos import test_video
@@ -179,6 +183,7 @@ async def read_updates_zero_mq(
     blocking: bool = False,
     end_callback: Callable[[Any], bool] = lambda x: False,
 ):
+    """Read updated frames from ZeroMQ."""
     import zmq
 
     ctx = zmq.Context()
@@ -216,6 +221,7 @@ async def read_updates_ros(
     poll_rate_hz=None,
     end_callback: Callable[[Any], bool] = lambda x: False,
 ):
+    """Read updated frames from ROS."""
     import rospy
     from rospy.numpy_msg import numpy_msg
     from rospy.client import _WFM
diff --git a/displayarray/frame/get_frame_ids.py b/displayarray/frame/get_frame_ids.py
index ac95b18..284aa7f 100644
--- a/displayarray/frame/get_frame_ids.py
+++ b/displayarray/frame/get_frame_ids.py
@@ -1,3 +1,5 @@
+"""Get camera IDs."""
+
 import cv2
 
 from typing import List
diff --git a/displayarray/frame/np_to_opencv.py b/displayarray/frame/np_to_opencv.py
index 3366aed..a9a482c 100644
--- a/displayarray/frame/np_to_opencv.py
+++ b/displayarray/frame/np_to_opencv.py
@@ -1,3 +1,5 @@
+"""Allow OpenCV to handle numpy arrays as input."""
+
 import numpy as np
 import cv2
 
@@ -6,6 +8,7 @@ class NpCam(object):
     """Add OpenCV camera controls to a numpy array."""
 
     def __init__(self, img):
+        """Create a fake camera for OpenCV based on the initial array."""
         assert isinstance(img, np.ndarray)
         self.__img = img
         self.__is_opened = True
diff --git a/displayarray/frame/subscriber_dictionary.py b/displayarray/frame/subscriber_dictionary.py
index 174bb3a..1955579 100644
--- a/displayarray/frame/subscriber_dictionary.py
+++ b/displayarray/frame/subscriber_dictionary.py
@@ -9,6 +9,7 @@ class CamHandler(object):
     """A camera handler instance that will send commands to and receive data from a camera."""
 
     def __init__(self, name, sub):
+        """Create the cam handler."""
         self.name = name
         self.cmd = None
         self.sub: VariableSub = sub
@@ -20,6 +21,7 @@ class Cam(object):
     """A camera publisher instance that will send frames, status, and commands out."""
 
     def __init__(self, name):
+        """Create the cam."""
         self.name = name
         self.cmd = None
         self.frame_pub = VariablePub()
diff --git a/displayarray/input.py b/displayarray/input.py
index c287bec..ea814cb 100644
--- a/displayarray/input.py
+++ b/displayarray/input.py
@@ -1,3 +1,5 @@
+"""Decorators for creating input loops that OpenCV handles."""
+
 from displayarray.window import window_commands
 import threading
 import time
@@ -9,6 +11,7 @@ class MouseEvent(object):
     """Holds all the OpenCV mouse event information."""
 
     def __init__(self, event, x, y, flags, param):
+        """Create an OpenCV mouse event."""
         self.event = event
         self.x = x
         self.y = y
@@ -62,10 +65,19 @@ class _mouse_loop_thread(object):  # NOSONAR
 
 
 class mouse_loop(object):  # NOSONAR
-    """Run a function on mouse information that is received by the window, continuously in a new thread."""
+    """
+    Run a function on mouse information that is received by the window, continuously in a new thread.
 
-    def __init__(self, f, run_when_no_events=False):
-        self.t = threading.Thread(target=_mouse_loop_thread(f, run_when_no_events))
+    >>> @mouse_loop
+    ... def fun(mouse_event):
+    ...   print("x:{}, y:{}".format(mouse_event.x, mouse_event.y))
+    """
+
+    def __init__(self, f):
+        """Start a new mouse thread for the decorated function."""
+        self.t = threading.Thread(
+            target=_mouse_loop_thread(f, run_when_no_events=False)
+        )
         self.t.start()
 
     def __call__(self, *args, **kwargs):
@@ -111,10 +123,17 @@ class _key_loop_thread(object):  # NOSONAR
 
 
 class key_loop(object):  # NOSONAR
-    """Run a function on mouse information that is received by the window, continuously in a new thread."""
+    """
+    Run a function on mouse information that is received by the window, continuously in a new thread.
 
-    def __init__(self, f: Callable[[str], None], run_when_no_events=False):
-        self.t = threading.Thread(target=_key_loop_thread(f, run_when_no_events))
+    >>> @key_loop
+    ... def fun(key):
+    ...   print("key pressed:{}".format(key))
+    """
+
+    def __init__(self, f: Callable[[str], None]):
+        """Start a new key thread for the decorated function."""
+        self.t = threading.Thread(target=_key_loop_thread(f, run_when_no_events=False))
         self.t.start()
 
     def __call__(self, *args, **kwargs):
diff --git a/displayarray/window/subscriber_windows.py b/displayarray/window/subscriber_windows.py
index 97c9b4c..d7b6f7a 100644
--- a/displayarray/window/subscriber_windows.py
+++ b/displayarray/window/subscriber_windows.py
@@ -1,3 +1,5 @@
+"""OpenCV windows that will display the arrays."""
+
 import warnings
 from threading import Thread
 from typing import List, Union, Callable, Any, Dict, Iterable, Optional
@@ -7,13 +9,13 @@ import numpy as np
 from localpubsub import NoData
 
 from displayarray.callbacks import global_cv_display_callback
-from displayarray.uid import uid_for_source
+from displayarray._uid import uid_for_source
 from displayarray.frame import subscriber_dictionary
 from displayarray.frame.frame_updater import FrameCallable
 from displayarray.frame.frame_updater import FrameUpdater
 from displayarray.input import MouseEvent
 from displayarray.window import window_commands
-from displayarray.util import WeakMethod
+from displayarray._util import WeakMethod
 from displayarray.effects.select_channels import SelectChannels
 
 
@@ -29,6 +31,7 @@ class SubscriberWindows(object):
         video_sources: Iterable[Union[str, int]] = (0,),
         callbacks: Optional[List[Callable[[np.ndarray], Any]]] = None,
     ):
+        """Create the array displaying window."""
         self.source_names: List[Union[str, int]] = []
         self.close_threads: Optional[List[Thread]] = []
         self.frames: List[np.ndarray] = []
@@ -52,6 +55,7 @@ class SubscriberWindows(object):
         return not self.exited
 
     def block(self):
+        """Update the window continuously while blocking the outer program."""
         self.loop()
         for ct in self.close_threads:
             ct.join()
diff --git a/displayarray/window/window_commands.py b/displayarray/window/window_commands.py
index f2015d1..f30a59c 100644
--- a/displayarray/window/window_commands.py
+++ b/displayarray/window/window_commands.py
@@ -1,3 +1,5 @@
+"""Commands to control the array displaying windows."""
+
 from localpubsub import VariablePub, VariableSub
 
 key_pub = VariablePub()
diff --git a/docs/.doctrees/environment.pickle b/docs/.doctrees/environment.pickle
index 98a1747..69f0ee3 100644
Binary files a/docs/.doctrees/environment.pickle and b/docs/.doctrees/environment.pickle differ
diff --git a/tox.ini b/tox.ini
index 2eb68c2..bf25cbd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -39,6 +39,9 @@ whitelist_externals = poetry
 description = enforce code style
 commands = poetry run black displayarray --check
 
+[pydocstyle]
+ignore = D105, D212, D203, D202
+
 [testenv:pydocstyle]
 whitelist_externals = poetry
 description = enforce documentation style