diff --git a/documentation/source/_static/custom.css b/documentation/source/_static/custom.css
index 2a908a932..798c613d8 100644
--- a/documentation/source/_static/custom.css
+++ b/documentation/source/_static/custom.css
@@ -2,6 +2,10 @@
 @import url("styles/theme.css");
 @import url("basic.css");
 
+.small-code {
+    font-size: 8pt;
+}
+
 /* Office Science Colours */
 html[data-theme="light"] {
     --pst-color-primary: #0f79be;
diff --git a/documentation/source/user_guide/checkpointing/lfric_atm_checkpoint.rst b/documentation/source/user_guide/checkpointing/lfric_atm_checkpoint.rst
index 2a664b051..a15eaa9b1 100644
--- a/documentation/source/user_guide/checkpointing/lfric_atm_checkpoint.rst
+++ b/documentation/source/user_guide/checkpointing/lfric_atm_checkpoint.rst
@@ -246,6 +246,7 @@ Simplified call tree for setting up I/O in LFRic_atm
 
 
 .. code-block:: rst
+  :class: small-code
 
   lfric_atm							(lfric_atm/lfric_atm.f90)
     │
@@ -277,8 +278,8 @@ Simplified call tree for setting up I/O in LFRic_atm
         │               │   │
         │               │   ├──persistor%init           		(gungho/driver/gungho_model_mod.F90)
         │               │   │
-        │               │   ├──process_gungho_prognostics(persistor)
-        │               │   │   │					(gungho/driver/create_gungho_prognostics_mod.F90)
+        │               │   ├──process_gungho_prognostics(persistor)	(gungho/driver/create_gungho_prognostics_mod.F90)
+        │               │   │   │
         │               │   │   └──persistor%apply(makespec())		(gungho/driver/gungho_model_mod.F90)
         │               │   │       │
         │               │   │       └──add_field			(components/lfric-xios/lfric_xios_metafile_mod.F90)
@@ -296,7 +297,8 @@ Simplified call tree for setting up I/O in LFRic_atm
         │
         └──create_model_data					(gungho/driver/gungho_init_fields_mod.X90)
             │
-            ├──field_mapper%init				(gungho/driver/field_mapper_mod.F90)          │
+            ├──field_mapper%init				(gungho/driver/field_mapper_mod.F90)
+            │
             └──create_gungho_prognostics			(gungho/driver/create_gungho_prognostics_mod.F90)
                 │
                 ├──creator%init					(gungho/driver/field_maker_mod.F90)