diff --git a/.gitignore b/.gitignore
index e677cc6..d6d2e73 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,7 +6,7 @@ poetry.lock
 venv*/
 docs/api/
 docs/examples/music*.svg
-pyabc2/sheet/test.*
+pyabc2/abcjs/headless/test.*
 
 # node
 node_modules
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 8b387a5..fb7a639 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -12,8 +12,8 @@ python:
       extra_requirements:
         - doc
         - sources
-        - widget
-        - sheet
+        - abcjs-widget
+        - abcjs-headless
 
 sphinx:
   configuration: docs/conf.py
diff --git a/docs/api.rst b/docs/api.rst
index e88c43e..c40945c 100644
--- a/docs/api.rst
+++ b/docs/api.rst
@@ -87,7 +87,7 @@ These methods/properties result from tune body parsing and repeat/ending expansi
 Tune sources
 ============
 
-.. currentmodule:: pyabc2.sources
+.. module:: pyabc2.sources
 
 The :mod:`pyabc2.sources` namespace contains a few general tools.
 
@@ -151,10 +151,15 @@ Functions:
    eskin.abctools_url_to_abc
    eskin.abc_to_abctools_url
 
+abcjs tools
+===========
+
+.. module:: pyabc2.abcjs
+
 Widget
-======
+------
 
-.. automodule:: pyabc2.widget
+.. automodule:: pyabc2.abcjs.widget
 
 .. autosummary::
    :toctree: api/
@@ -164,9 +169,9 @@ Widget
 
 
 Headless rendering
-==================
+------------------
 
-.. automodule:: pyabc2.sheet
+.. automodule:: pyabc2.abcjs.headless
 
 .. autosummary::
    :toctree: api/
@@ -174,3 +179,14 @@ Headless rendering
    svg
    svg_to
    build
+
+HTML page generation
+--------------------
+
+.. automodule:: pyabc2.abcjs.htmlgen
+
+.. autosummary::
+   :toctree: api/
+
+   html
+   open_html
diff --git a/docs/examples/widget.ipynb b/docs/examples/widget.ipynb
index ecb771a..46dc2a0 100644
--- a/docs/examples/widget.ipynb
+++ b/docs/examples/widget.ipynb
@@ -18,7 +18,7 @@
     "import ipywidgets as ipw\n",
     "from IPython.display import SVG\n",
     "\n",
-    "from pyabc2.widget import ABCJSWidget, interactive"
+    "from pyabc2.abcjs.widget import ABCJSWidget, interactive"
    ]
   },
   {
@@ -28,7 +28,8 @@
    "source": [
     "## The display widget\n",
     "\n",
-    "Used to {ref}`display <tune_type>` {class}`~pyabc2.Tune`s in the notebook environment."
+    "Used to {ref}`display <tune_type>` {class}`~pyabc2.Tune`s in the notebook environment.\n",
+    "{class}`~pyabc2.abcjs.widget.ABCJSWidget` supports many of the [abcjs render options](https://docs.abcjs.net/visual/render-abc-options.html)."
    ]
   },
   {
@@ -274,7 +275,7 @@
    "source": [
     "## Headless\n",
     "\n",
-    "We can also use abcjs in the background via Node.js using {mod}`pyabc2.sheet`."
+    "We can also use abcjs in the background via Node.js using {mod}`pyabc2.abcjs.headless`."
    ]
   },
   {
@@ -286,7 +287,7 @@
    "source": [
     "from IPython.display import SVG, Image\n",
     "\n",
-    "from pyabc2.sheet import svg, svg_to"
+    "from pyabc2.abcjs.headless import svg, svg_to"
    ]
   },
   {
@@ -306,8 +307,8 @@
    "id": "26",
    "metadata": {},
    "source": [
-    "{func}`~pyabc2.sheet.build` is automatically called if needed.\n",
-    "But the next time we call {func}`~pyabc2.sheet.svg`, it will be ready to go:"
+    "{func}`~pyabc2.abcjs.headless.build` is automatically called if needed.\n",
+    "The next time we call {func}`~pyabc2.abcjs.headless.svg`, it should be faster."
    ]
   },
   {
diff --git a/pyabc2/sheet/__init__.py b/pyabc2/abcjs/headless/__init__.py
similarity index 97%
rename from pyabc2/sheet/__init__.py
rename to pyabc2/abcjs/headless/__init__.py
index e01e475..121c169 100644
--- a/pyabc2/sheet/__init__.py
+++ b/pyabc2/abcjs/headless/__init__.py
@@ -24,7 +24,7 @@ def build():
         raise RuntimeError(
             "The 'nodejs-wheel-binaries' package is required "
             "to render sheet music in the background with abcjs via Node.js. "
-            "It is included with the pyabc2 'sheet' extra."
+            "It is included with the pyabc2 'abcjs-headless' extra."
         ) from e
 
     rc = npm(["install", "--prefix", HERE.as_posix()])
@@ -64,7 +64,7 @@ def svg(
     **kwargs
         Additional abcjs options that haven't been explicitly defined here
         in the signature.
-        https://paulrosen.github.io/abcjs/visual/render-abc-options.html
+        https://docs.abcjs.net/visual/render-abc-options.html
     """
     from nodejs_wheel import node
 
diff --git a/pyabc2/sheet/cli.cjs b/pyabc2/abcjs/headless/cli.cjs
similarity index 100%
rename from pyabc2/sheet/cli.cjs
rename to pyabc2/abcjs/headless/cli.cjs
diff --git a/pyabc2/sheet/package.json b/pyabc2/abcjs/headless/package.json
similarity index 100%
rename from pyabc2/sheet/package.json
rename to pyabc2/abcjs/headless/package.json
diff --git a/pyabc2/sheet/render.js b/pyabc2/abcjs/headless/render.js
similarity index 100%
rename from pyabc2/sheet/render.js
rename to pyabc2/abcjs/headless/render.js
diff --git a/pyabc2/html.py b/pyabc2/abcjs/htmlgen/__init__.py
similarity index 97%
rename from pyabc2/html.py
rename to pyabc2/abcjs/htmlgen/__init__.py
index 0576d9f..6f2aa94 100644
--- a/pyabc2/html.py
+++ b/pyabc2/abcjs/htmlgen/__init__.py
@@ -52,7 +52,7 @@ def html(
     **kwargs
         Additional abcjs options that haven't been explicitly defined here
         in the signature.
-        https://paulrosen.github.io/abcjs/visual/render-abc-options.html
+        https://docs.abcjs.net/visual/render-abc-options.html
     """
     params = {
         **kwargs,
diff --git a/pyabc2/widget/__init__.py b/pyabc2/abcjs/widget/__init__.py
similarity index 95%
rename from pyabc2/widget/__init__.py
rename to pyabc2/abcjs/widget/__init__.py
index a953e11..9ddb999 100644
--- a/pyabc2/widget/__init__.py
+++ b/pyabc2/abcjs/widget/__init__.py
@@ -19,10 +19,13 @@
 class ABCJSWidget(anywidget.AnyWidget):
     """Display SVG sheet music rendered from ABC notation by abcjs.
 
+    Many of the `render options <https://docs.abcjs.net/visual/render-abc-options.html>`__
+    are supported, though some names have been modified to fit the Python style.
+
     Examples
     --------
-    >>> from pyabc2.widget import ABCJSWidget
-    >>> w = ABCJSWidget(abc="ABCD", staff_width=250)
+    >>> from pyabc2.abcjs.widget import ABCJSWidget
+    >>> w = ABCJSWidget(abc='ABCD', staff_width=250)
     """
 
     _esm = HERE / "index.js"
diff --git a/pyabc2/widget/index.css b/pyabc2/abcjs/widget/index.css
similarity index 100%
rename from pyabc2/widget/index.css
rename to pyabc2/abcjs/widget/index.css
diff --git a/pyabc2/widget/index.js b/pyabc2/abcjs/widget/index.js
similarity index 100%
rename from pyabc2/widget/index.js
rename to pyabc2/abcjs/widget/index.js
diff --git a/pyabc2/parse.py b/pyabc2/parse.py
index 9105410..2f06f32 100644
--- a/pyabc2/parse.py
+++ b/pyabc2/parse.py
@@ -336,9 +336,7 @@ def _extract_measures(self, tune_lines: list[str]) -> None:
         self.measures = measures
 
     def __repr__(self):
-        return (
-            f"{self.__class__.__name__}(title={self.title!r}, key={self.key}, type={self.type!r})"
-        )
+        return f"{type(self).__name__}(title={self.title!r}, key={self.key}, type={self.type!r})"
 
     def __eq__(self, other):
         if not isinstance(other, type(self)):
@@ -354,10 +352,10 @@ def _repr_html_(self):  # pragma: no cover
         try:
             from IPython.display import display
 
-            from .widget import ABCJSWidget
+            from .abcjs.widget import ABCJSWidget
         except ImportError:
             warnings.warn(
-                "The 'widget' extra is required for HTML representation of tunes via abcjs."
+                "The 'abcjs-widget' extra is required for HTML representation of tunes via abcjs."
             )
         else:
             display(ABCJSWidget(abc=self.abc))
diff --git a/pyproject.toml b/pyproject.toml
index 2e0e648..3fc9cf3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,12 +23,12 @@ sources = [
     "pandas ==2.*",
     "requests ==2.*",
 ]
-widget = [
+abcjs-widget = [
     "anywidget",
     "ipywidgets",
     "traitlets",
 ]
-sheet = [
+abcjs-headless = [
     "cairosvg",
     "nodejs-wheel-binaries",
 ]
diff --git a/tests/test_abcjs_nodejs.py b/tests/test_abcjs_headless.py
similarity index 96%
rename from tests/test_abcjs_nodejs.py
rename to tests/test_abcjs_headless.py
index a789994..4ec45ce 100644
--- a/tests/test_abcjs_nodejs.py
+++ b/tests/test_abcjs_headless.py
@@ -1,6 +1,6 @@
 import pytest
 
-from pyabc2.sheet import svg, svg_to
+from pyabc2.abcjs.headless import svg, svg_to
 
 HAVE_CAIROSVG = True
 try:
diff --git a/tests/test_html.py b/tests/test_html.py
index 1395f8a..a087759 100644
--- a/tests/test_html.py
+++ b/tests/test_html.py
@@ -1,7 +1,7 @@
 from pathlib import Path
 from tempfile import gettempdir
 
-from pyabc2.html import html, open_html
+from pyabc2.abcjs.htmlgen import html, open_html
 
 TMP = gettempdir()