diff --git a/docs/_static/custom.css b/docs/_static/custom.css
index 93600d107..1b14402cd 100644
--- a/docs/_static/custom.css
+++ b/docs/_static/custom.css
@@ -1,10 +1,6 @@
 
 /* Main Page Stylings */
 
-.container-xl {
-    max-width: 1400px;
-}
-
 .intro-card {
     background-color: var(--pst-color-background);
     margin-bottom: 30px;
@@ -80,7 +76,3 @@ button span.theme-switch:hover {
 .dataframe tbody th, .dataframe tbody td {
     padding: 10px;
 }
-
-.bd-sidebar-primary, .bd-sidebar-secondary {
-    position: sticky;
-}
diff --git a/docs/api_reference/collections.rst b/docs/api_reference/collections.rst
new file mode 100644
index 000000000..83cabfd21
--- /dev/null
+++ b/docs/api_reference/collections.rst
@@ -0,0 +1,23 @@
+Collections
+-----------
+
+Matrix
+~~~~~~
+
+.. autoclass:: graphblas.Matrix
+    :members:
+    :special-members: __getitem__, __setitem__, __delitem__, __contains__, __iter__
+
+Vector
+~~~~~~
+
+.. autoclass:: graphblas.Vector
+    :members:
+    :special-members: __getitem__, __setitem__, __delitem__, __contains__, __iter__
+
+Scalar
+~~~~~~
+
+.. autoclass:: graphblas.Scalar
+    :members:
+    :special-members: __eq__, __bool__
diff --git a/docs/api_reference/exceptions.rst b/docs/api_reference/exceptions.rst
new file mode 100644
index 000000000..7968f854c
--- /dev/null
+++ b/docs/api_reference/exceptions.rst
@@ -0,0 +1,7 @@
+Exceptions
+----------
+
+.. automodule:: graphblas.exceptions
+    :members: InvalidObject, InvalidIndex, DomainMismatch, DimensionMismatch,
+              OutputNotEmpty, OutOfMemory, IndexOutOfBound, Panic, EmptyObject,
+              NotImplementedException, UdfParseError
diff --git a/docs/api_reference/index.rst b/docs/api_reference/index.rst
index 2f829e29a..84e7d65eb 100644
--- a/docs/api_reference/index.rst
+++ b/docs/api_reference/index.rst
@@ -4,131 +4,10 @@
 API Reference
 =============
 
-Collections
------------
+.. toctree::
+    :maxdepth: 2
 
-Matrix
-~~~~~~
-
-.. autoclass:: graphblas.Matrix
-    :members:
-    :special-members: __getitem__, __setitem__, __delitem__, __contains__, __iter__
-
-Vector
-~~~~~~
-
-.. autoclass:: graphblas.Vector
-    :members:
-    :special-members: __getitem__, __setitem__, __delitem__, __contains__, __iter__
-
-Scalar
-~~~~~~
-
-.. autoclass:: graphblas.Scalar
-    :members:
-    :special-members: __eq__, __bool__
-
-Operators
----------
-
-UnaryOp
-~~~~~~~
-
-.. autoclass:: graphblas.core.operator.UnaryOp()
-    :members:
-
-BinaryOp
-~~~~~~~~
-
-.. autoclass:: graphblas.core.operator.BinaryOp()
-    :members:
-
-Monoid
-~~~~~~
-
-.. autoclass:: graphblas.core.operator.Monoid()
-    :members:
-
-Semiring
-~~~~~~~~
-
-.. autoclass:: graphblas.core.operator.Semiring()
-    :members:
-
-IndexUnaryOp
-~~~~~~~~~~~~
-
-.. autoclass:: graphblas.core.operator.IndexUnaryOp()
-    :members:
-
-SelectOp
-~~~~~~~~
-
-.. autoclass:: graphblas.core.operator.SelectOp()
-    :members:
-
-
-Input/Output
-------------
-
-NetworkX
-~~~~~~~~
-
-These methods require `networkx <https://networkx.org/>`_ to be installed.
-
-.. autofunction:: graphblas.io.from_networkx
-
-.. autofunction:: graphblas.io.to_networkx
-
-Numpy
-~~~~~
-
-These methods require `scipy <https://scipy.org/>`_ to be installed, as some
-of the scipy.sparse machinery is used during the conversion process.
-
-.. autofunction:: graphblas.io.from_numpy
-
-.. autofunction:: graphblas.io.to_numpy
-
-Scipy Sparse
-~~~~~~~~~~~~
-
-These methods require `scipy <https://scipy.org/>`_ to be installed.
-
-.. autofunction:: graphblas.io.from_scipy_sparse
-
-.. autofunction:: graphblas.io.to_scipy_sparse
-
-PyData Sparse
-~~~~~~~~~~~~~
-
-These methods require `sparse <https://sparse.pydata.org/>`_ to be installed.
-
-.. autofunction:: graphblas.io.from_pydata_sparse
-
-.. autofunction:: graphblas.io.to_pydata_sparse
-
-Matrix Market
-~~~~~~~~~~~~~
-
-Matrix Market is a `plain-text format <https://math.nist.gov/MatrixMarket/formats.html>`_ for storing graphs.
-
-These methods require `scipy <https://scipy.org/>`_ to be installed.
-
-.. autofunction:: graphblas.io.mmread
-
-.. autofunction:: graphblas.io.mmwrite
-
-Visualization
-~~~~~~~~~~~~~
-
-.. autofunction:: graphblas.io.draw
-
-
-Exceptions
-----------
-
-.. automodule:: graphblas.exceptions
-    :members: InvalidObject, InvalidIndex, DomainMismatch, DimensionMismatch,
-              OutputNotEmpty, OutOfMemory, IndexOutOfBound, Panic, EmptyObject,
-              NotImplementedException, UdfParseError
+    collections
+    operators
+    io
+    exceptions
diff --git a/docs/api_reference/io.rst b/docs/api_reference/io.rst
new file mode 100644
index 000000000..1b42c0648
--- /dev/null
+++ b/docs/api_reference/io.rst
@@ -0,0 +1,55 @@
+Input/Output
+------------
+
+NetworkX
+~~~~~~~~
+
+These methods require `networkx <https://networkx.org/>`_ to be installed.
+
+.. autofunction:: graphblas.io.from_networkx
+
+.. autofunction:: graphblas.io.to_networkx
+
+Numpy
+~~~~~
+
+These methods require `scipy <https://scipy.org/>`_ to be installed, as some
+of the scipy.sparse machinery is used during the conversion process.
+
+.. autofunction:: graphblas.io.from_numpy
+
+.. autofunction:: graphblas.io.to_numpy
+
+Scipy Sparse
+~~~~~~~~~~~~
+
+These methods require `scipy <https://scipy.org/>`_ to be installed.
+
+.. autofunction:: graphblas.io.from_scipy_sparse
+
+.. autofunction:: graphblas.io.to_scipy_sparse
+
+PyData Sparse
+~~~~~~~~~~~~~
+
+These methods require `sparse <https://sparse.pydata.org/>`_ to be installed.
+
+.. autofunction:: graphblas.io.from_pydata_sparse
+
+.. autofunction:: graphblas.io.to_pydata_sparse
+
+Matrix Market
+~~~~~~~~~~~~~
+
+Matrix Market is a `plain-text format <https://math.nist.gov/MatrixMarket/formats.html>`_ for storing graphs.
+
+These methods require `scipy <https://scipy.org/>`_ to be installed.
+
+.. autofunction:: graphblas.io.mmread
+
+.. autofunction:: graphblas.io.mmwrite
+
+Visualization
+~~~~~~~~~~~~~
+
+.. autofunction:: graphblas.io.draw
diff --git a/docs/api_reference/operators.rst b/docs/api_reference/operators.rst
new file mode 100644
index 000000000..8836bb638
--- /dev/null
+++ b/docs/api_reference/operators.rst
@@ -0,0 +1,38 @@
+Operators
+---------
+
+UnaryOp
+~~~~~~~
+
+.. autoclass:: graphblas.core.operator.UnaryOp()
+    :members:
+
+BinaryOp
+~~~~~~~~
+
+.. autoclass:: graphblas.core.operator.BinaryOp()
+    :members:
+
+Monoid
+~~~~~~
+
+.. autoclass:: graphblas.core.operator.Monoid()
+    :members:
+
+Semiring
+~~~~~~~~
+
+.. autoclass:: graphblas.core.operator.Semiring()
+    :members:
+
+IndexUnaryOp
+~~~~~~~~~~~~
+
+.. autoclass:: graphblas.core.operator.IndexUnaryOp()
+    :members:
+
+SelectOp
+~~~~~~~~
+
+.. autoclass:: graphblas.core.operator.SelectOp()
+    :members: