diff --git a/src/stk/molecular/topology_graphs/cof/periodic_hexagonal.py b/src/stk/molecular/topology_graphs/cof/periodic_hexagonal.py
index 41c7fefc1..6b7f92dad 100644
--- a/src/stk/molecular/topology_graphs/cof/periodic_hexagonal.py
+++ b/src/stk/molecular/topology_graphs/cof/periodic_hexagonal.py
@@ -30,8 +30,8 @@ class PeriodicHexagonal(Cof):
         | 6-functional groups: 0 to 3
         | 2-functional groups: 4 to 15
 
-    Note that only :class:`.PeriodicCollapser` optimizes the
-    :class:`.PeriodicInfo`.
+    Note that optimizers may not optimize the :class:`.PeriodicInfo`.
+    The documentation of the optimizer will state if it does.
 
     See :class:`.Cof` for more details and examples.
 
diff --git a/src/stk/molecular/topology_graphs/cof/periodic_honeycomb.py b/src/stk/molecular/topology_graphs/cof/periodic_honeycomb.py
index 9486465a2..d93e44e9e 100644
--- a/src/stk/molecular/topology_graphs/cof/periodic_honeycomb.py
+++ b/src/stk/molecular/topology_graphs/cof/periodic_honeycomb.py
@@ -30,8 +30,8 @@ class PeriodicHoneycomb(Cof):
         | 3-functional groups: 0 to 1
         | 2-functional groups: 2 to 4
 
-    Note that only :class:`.PeriodicCollapser` optimizes the
-    :class:`.PeriodicInfo`.
+    Note that optimizers may not optimize the :class:`.PeriodicInfo`.
+    The documentation of the optimizer will state if it does.
 
     See :class:`.Cof` for more details and examples.
 
diff --git a/src/stk/molecular/topology_graphs/cof/periodic_kagome.py b/src/stk/molecular/topology_graphs/cof/periodic_kagome.py
index aa22fb3d7..abab824dc 100644
--- a/src/stk/molecular/topology_graphs/cof/periodic_kagome.py
+++ b/src/stk/molecular/topology_graphs/cof/periodic_kagome.py
@@ -30,8 +30,8 @@ class PeriodicKagome(Cof):
         | 4-functional groups: 0 to 2
         | 2-functional groups: 3 to 8
 
-    Note that only :class:`.PeriodicCollapser` optimizes the
-    :class:`.PeriodicInfo`.
+    Note that optimizers may not optimize the :class:`.PeriodicInfo`.
+    The documentation of the optimizer will state if it does.
 
     See :class:`.Cof` for more details and examples.
 
diff --git a/src/stk/molecular/topology_graphs/cof/periodic_linkerless_honeycomb.py b/src/stk/molecular/topology_graphs/cof/periodic_linkerless_honeycomb.py
index bc7ee85c0..d8a2c9873 100644
--- a/src/stk/molecular/topology_graphs/cof/periodic_linkerless_honeycomb.py
+++ b/src/stk/molecular/topology_graphs/cof/periodic_linkerless_honeycomb.py
@@ -29,8 +29,8 @@ class PeriodicLinkerlessHoneycomb(Cof):
 
         | 3-functional groups: 0 to 1
 
-    Note that only :class:`.PeriodicCollapser` optimizes the
-    :class:`.PeriodicInfo`.
+    Note that optimizers may not optimize the :class:`.PeriodicInfo`.
+    The documentation of the optimizer will state if it does.
 
     See :class:`.Cof` for more details and examples.
 
diff --git a/src/stk/molecular/topology_graphs/cof/periodic_square.py b/src/stk/molecular/topology_graphs/cof/periodic_square.py
index 07d51fa6c..a40039fa7 100644
--- a/src/stk/molecular/topology_graphs/cof/periodic_square.py
+++ b/src/stk/molecular/topology_graphs/cof/periodic_square.py
@@ -9,11 +9,7 @@
 from ...reactions import GenericReactionFactory
 from .cof import Cof
 from .vertices import _LinearCofVertex, _NonLinearCofVertex
-from ..topology_graph import (
-    Edge,
-    NullOptimizer,
-    PeriodicConstructionResult,
-)
+from ..topology_graph import Edge, NullOptimizer
 from ...periodic_info import PeriodicInfo
 
 
@@ -33,8 +29,8 @@ class PeriodicSquare(Cof):
         | 4-functional groups: 0
         | 2-functional groups: 1 to 2
 
-    Note that only :class:`.PeriodicCollapser` optimizes the
-    :class:`.PeriodicInfo`.
+    Note that optimizers may not optimize the :class:`.PeriodicInfo`.
+    The documentation of the optimizer will state if it does.
 
     See :class:`.Cof` for more details and examples.
 
diff --git a/src/stk/molecular/topology_graphs/topology_graph/optimizers/periodic_collapser.py b/src/stk/molecular/topology_graphs/topology_graph/optimizers/periodic_collapser.py
index 986bf0db4..d09379ab8 100644
--- a/src/stk/molecular/topology_graphs/topology_graph/optimizers/periodic_collapser.py
+++ b/src/stk/molecular/topology_graphs/topology_graph/optimizers/periodic_collapser.py
@@ -14,6 +14,8 @@ class PeriodicCollapser(Optimizer):
     """
     Performs rigid-body collapse of molecules [1]_.
 
+    This :class:`.Optimizer` will also update the `.PeriodicInfo`.
+
     Examples
     --------
     *Structure Optimization*