diff --git a/doc/src/Library_add.rst b/doc/src/Library_add.rst
index d35ba5616b..8777ebbcad 100644
--- a/doc/src/Library_add.rst
+++ b/doc/src/Library_add.rst
@@ -1,5 +1,5 @@
-Extending the Library interface
-===============================
+Extending the C API
+===================
 
 The functionality of the LAMMPS library interface has historically
 been motivated by the needs of its users.  Functions have been added
diff --git a/doc/src/Library_objects.rst b/doc/src/Library_objects.rst
index 5ce03f84a3..eed14b3a05 100644
--- a/doc/src/Library_objects.rst
+++ b/doc/src/Library_objects.rst
@@ -1,5 +1,5 @@
-Retrieving or setting properties of LAMMPS objects
-==================================================
+Compute, fixes, variables
+=========================
 
 This section documents accessing or modifying data stored by computes,
 fixes, or variables in LAMMPS using the following functions:
diff --git a/doc/src/Library_scatter.rst b/doc/src/Library_scatter.rst
index 1bbce6cc4e..40a79c2d9b 100644
--- a/doc/src/Library_scatter.rst
+++ b/doc/src/Library_scatter.rst
@@ -1,5 +1,5 @@
-Per-atom scatter/gather operations
-==================================
+Scatter/gather operations
+=========================
 
 This section has functions which gather per-atom data from one or more
 processors into a contiguous global list ordered by atom ID.  The same