diff --git a/docs/source/code.rst b/docs/source/code.rst
index 97d4f87c08e5364911b926ce15e1c1f710bb354b..88be215ff7e64fd74aabace144ce6a17bed4cbf2 100644
--- a/docs/source/code.rst
+++ b/docs/source/code.rst
@@ -1,4 +1,3 @@
-.. currentmodule:: nifty5
=============
Code Overview
@@ -37,9 +36,12 @@ Domains
Abstract base class
-------------------
+.. currentmodule:: nifty5.domains.domain
+
One of the fundamental building blocks of the NIFTy5 framework is the *domain*.
-Its required capabilities are expressed by the abstract :class:`Domain` class.
+Its required capabilities are expressed by the abstract :py:class:`Domain` class.
A domain must be able to answer the following queries:
+m
- its total number of data entries (pixels), which is accessible via the
:attr:`~Domain.size` property
@@ -51,6 +53,8 @@ A domain must be able to answer the following queries:
Unstructured domains
--------------------
+.. currentmodule:: nifty5.domains.unstructured_domain
+
Domains can be either *structured* (i.e. there is geometrical information
associated with them, like position in space and volume factors),
or *unstructured* (meaning that the data points have no associated manifold).
@@ -62,6 +66,8 @@ Unstructured domains can be described by instances of NIFTy's
Structured domains
------------------
+.. currentmodule:: nifty5.domains.structured_domain
+
In contrast to unstructured domains, these domains have an assigned geometry.
NIFTy requires them to provide the volume elements of their grid cells.
The additional methods are specified in the abstract class
@@ -81,15 +87,17 @@ The additional methods are specified in the abstract class
NIFTy comes with several concrete subclasses of :class:`StructuredDomain`:
-- :class:`RGSpace` represents a regular Cartesian grid with an arbitrary
+.. currentmodule:: nifty5.domains
+
+- :class:`rg_space.RGSpace` represents a regular Cartesian grid with an arbitrary
number of dimensions, which is supposed to be periodic in each dimension.
-- :class:`HPSpace` and :class:`GLSpace` describe pixelisations of the
- 2-sphere; their counterpart in harmonic space is :class:`LMSpace`, which
+- :class:`hp_space.HPSpace` and :class:`gl_space.GLSpace` describe pixelisations of the
+ 2-sphere; their counterpart in harmonic space is :class:`lm_space.LMSpace`, which
contains spherical harmonic coefficients.
-- :class:`PowerSpace` is used to describe one-dimensional power spectra.
+- :class:`power_space.PowerSpace` is used to describe one-dimensional power spectra.
-Among these, :class:`RGSpace` can be harmonic or not (depending on constructor arguments), :class:`GLSpace`, :class:`HPSpace`, and :class:`PowerSpace` are
-pure position domains (i.e. nonharmonic), and :class:`LMSpace` is always
+Among these, :class:`rg_space.RGSpace` can be harmonic or not (depending on constructor arguments), :class:`gl_space.GLSpace`, :class:`hp_space.HPSpace`, and :class:`power_space.PowerSpace` are
+pure position domains (i.e. nonharmonic), and :class:`lm_space.LMSpace` is always
harmonic.