diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d79520f54de8b5db90bf780d6d0db19fadd12c64..5aa60d45b8c7a8b3e5a29fe9eb14a6442ce14340 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -51,18 +51,14 @@ test_mpi:
     - mpiexec -n 2 --bind-to none pytest-3 -q test
 
 pages:
-  stage: release
-  before_script:
-    - ls
+  # FIXME Build only for main branch and set stage to release
+  stage: test
   script:
-    - python3 setup.py install --user -f
     - sh docs/generate.sh
     - mv docs/build/ public/
   artifacts:
     paths:
     - public
-  only:
-  - NIFTy_4
 
 before_script:
   - python3 setup.py install --user -f
diff --git a/Dockerfile b/Dockerfile
index 3c25b1f9c79064d73931ceba754a515bfb94336e..dbeaf3e7468d24158bb63ffaa36908d6feda16e8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,7 @@ RUN apt-get update && apt-get install -y \
     # Packages needed for NIFTy
     python3-scipy \
     # Documentation build dependencies
-    python3-sphinx-rtd-theme \
+    python3-sphinx-rtd-theme dvipng texlive-latex-base texlive-latex-extra \
     # Testing dependencies
     python3-pytest-cov jupyter \
     # Optional NIFTy dependencies
diff --git a/nifty5/field.py b/nifty5/field.py
index 90d7b39186e5b1ac8f1d7b9bef707310534629d9..b0e5ef0077dd2ea20f2003d4ef2559e28645cc66 100644
--- a/nifty5/field.py
+++ b/nifty5/field.py
@@ -36,8 +36,8 @@ class Field(object):
         This object's global shape must match the domain shape
         After construction, the object will no longer be writeable!
 
-    Note
-    ----
+    Notes
+    -----
     If possible, do not invoke the constructor directly, but use one of the
     many convenience functions for instantiation!
     """
@@ -190,8 +190,8 @@ class Field(object):
     def val(self):
         """dobj.data_object : the data object storing the field's entries.
 
-        Note
-        ----
+        Notes
+        -----
         This property is intended for low-level, internal use only. Do not use
         from outside of NIFTy's core; there should be better alternatives.
         """
diff --git a/nifty5/library/correlated_fields.py b/nifty5/library/correlated_fields.py
index ea7d39f0c7e6caf91e9a28237883ade4d9c59345..8d347ea3b5268eb3af7355efe313c925f7a8e23a 100644
--- a/nifty5/library/correlated_fields.py
+++ b/nifty5/library/correlated_fields.py
@@ -50,6 +50,13 @@ def CorrelatedField(target, amplitude_operator, name='xi', codomain=None):
     -------
     Operator
         Correlated field
+
+    Notes
+    -----
+    In NIFTy, non-harmonic RGSpaces are by definition periodic. Therefore
+    the operator constructed by this method will output a correlated field
+    with *periodic* boundary conditions. If a non-periodic field is needed,
+    one needs to combine this operator with a :class:`FieldZeroPadder`.
     """
     tgt = DomainTuple.make(target)
     if len(tgt) > 1:
@@ -90,6 +97,14 @@ def MfCorrelatedField(target, amplitudes, name='xi'):
     -------
     Operator
         Correlated field
+
+    Notes
+    -----
+    In NIFTy, non-harmonic RGSpaces are by definition periodic. Therefore
+    the operator constructed by this method will output a correlated field
+    with *periodic* boundary conditions. If a non-periodic field is needed,
+    one needs to combine this operator with a :class:`FieldZeroPadder` or even
+    two (one for the energy and one for the spatial subdomain)
     """
     tgt = DomainTuple.make(target)
     if len(tgt) != 2: