diff --git a/Changelog.md b/Changelog.md
index 35e3f5a23..4a409ad92 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,12 +1,12 @@
-## Gazebo Gui 7
+## Gazebo GUI 7
 
-### Gazebo Gui 7.X.X
+### Gazebo GUI 7.X.X
 
-### Gazebo Gui 7.0.0 (202X-XX-XX)
+### Gazebo GUI 7.0.0 (202X-XX-XX)
 
-## Gazebo Gui 6
+## Gazebo GUI 6
 
-### Gazebo Gui 6.4.0 (2022-02-01)
+### Gazebo GUI 6.4.0 (2022-02-01)
 
 1. Improve inserting WorldControl and WorldStats from menu
     * [Pull request #349](https://github.com/gazebosim/gz-gui/pull/349)
@@ -20,12 +20,12 @@
 1. Add project() to examples and remove hard-dependency on Ogre1
     * [Pull request #345](https://github.com/gazebosim/gz-gui/pull/345)
 
-### Gazebo Gui 6.3.0 (2022-01-06)
+### Gazebo GUI 6.3.0 (2022-01-06)
 
 1. NavSat (GPS) map plugin
     * [Pull request #342](https://github.com/gazebosim/gz-gui/pull/342)
 
-### Gazebo Gui 6.2.0 (2021-12-08)
+### Gazebo GUI 6.2.0 (2021-12-08)
 
 1. Grid config: set values from startup and improve layout
     * [Pull request #324](https://github.com/gazebosim/gz-gui/pull/324)
@@ -58,7 +58,7 @@
 1. Added log storing for ign-gui
     * [Pull request #272](https://github.com/gazebosim/gz-gui/pull/272)
 
-### Gazebo Gui 6.1.0 (2021-11-05)
+### Gazebo GUI 6.1.0 (2021-11-05)
 
 1. Improved doxygen
     * [Pull request #275](https://github.com/gazebosim/gz-gui/pull/275)
@@ -75,7 +75,7 @@
 1. Support emitting an event on play/pause/step
     * [Pull request #306](https://github.com/gazebosim/gz-gui/pull/306)
 
-### Gazebo Gui 6.0.0 (2021-09-XX)
+### Gazebo GUI 6.0.0 (2021-09-XX)
 
 1. Add a filter to the plugin menu
     * [Pull request #277](https://github.com/gazebosim/gz-gui/pull/277)
@@ -138,9 +138,9 @@
     * [Pull request #266](https://github.com/gazebosim/gz-gui/pull/266)
     * [Pull request #274](https://github.com/gazebosim/gz-gui/pull/274)
 
-## Gazebo Gui 5
+## Gazebo GUI 5
 
-### Gazebo Gui 5.5.0 (2022-03-28)
+### Gazebo GUI 5.5.0 (2022-03-28)
 
 1. Fix some Qt warnings
     * [Pull request #376](https://github.com/gazebosim/gz-gui/pull/376)
@@ -158,7 +158,7 @@
 1. Backport GridConfig improvements to Grid3D
     * [Pull request #363](https://github.com/gazebosim/gz-gui/pull/363)
 
-### Gazebo Gui 5.4.0 (2022-01-31)
+### Gazebo GUI 5.4.0 (2022-01-31)
 
 1. Improve inserting WorldControl and WorldStats from menu
     * [Pull request #349](https://github.com/gazebosim/gz-gui/pull/349)
@@ -188,7 +188,7 @@
     * [Pull request #272](https://github.com/gazebosim/gz-gui/pull/272)
 
 
-### Gazebo Gui 5.3.0 (2021-10-13)
+### Gazebo GUI 5.3.0 (2021-10-13)
 
 1. Improved doxygen
     * [Pull request #275](https://github.com/gazebosim/gz-gui/pull/275)
@@ -205,7 +205,7 @@
 1. Fix doc build error
     * [Pull request #266](https://github.com/gazebosim/gz-gui/pull/266)
 
-### Gazebo Gui 5.2.0 (2021-07-27)
+### Gazebo GUI 5.2.0 (2021-07-27)
 
 1. New teleop plugin implementation.
     * [Pull request #245](https://github.com/gazebosim/gz-gui/pull/245)
@@ -222,7 +222,7 @@
 1. Detect ign instead of using cmake module to check for ignition-tools
     * [Pull request #240](https://github.com/gazebosim/gz-gui/pull/240)
 
-### Gazebo Gui 5.1.0 (2021-06-23)
+### Gazebo GUI 5.1.0 (2021-06-23)
 
 1. Depend on common 4.1 and rendering 5.1
     * [Pull request #238](https://github.com/gazebosim/gz-gui/pull/238)
@@ -260,7 +260,7 @@
 1. `check_test_ran.py`: remove grep/xsltproc
     * [Pull request #203](https://github.com/gazebosim/gz-gui/pull/203)
 
-### Gazebo Gui 5.0.0 (2021-03-31)
+### Gazebo GUI 5.0.0 (2021-03-31)
 
 1. Bump in edifice: ign-common4
     * [Pull request #169](https://github.com/gazebosim/gz-gui/pull/169)
@@ -275,14 +275,14 @@
     * [Pull request #202](https://github.com/gazebosim/gz-gui/pull/202)
     * [Pull request #204](https://github.com/gazebosim/gz-gui/pull/204)
 
-## Gazebo Gui 4
+## Gazebo GUI 4
 
-### Gazebo Gui 4.X.X
+### Gazebo GUI 4.X.X
 
-### Gazebo Gui 4.X.X (20XX-XX-XX)
+### Gazebo GUI 4.X.X (20XX-XX-XX)
 
 
-### Gazebo Gui 4.5.0 (2021-07-26)
+### Gazebo GUI 4.5.0 (2021-07-26)
 
 1. New teleop plugin implementation.
     * [Pull request #245](https://github.com/gazebosim/gz-gui/pull/245)
@@ -302,7 +302,7 @@
 1. Detect ign instead of using cmake module to check for ignition-tools
     * [Pull request #240](https://github.com/gazebosim/gz-gui/pull/240)
 
-### Gazebo Gui 4.4.0 (2021-06-21)
+### Gazebo GUI 4.4.0 (2021-06-21)
 
 1. Bump required ign-rendering version to 4.8
     * [Pull request #234](https://github.com/gazebosim/gz-gui/pull/234)
@@ -340,7 +340,7 @@
 1. Scene3D: port mesh material fixes from ign-gazebo
     * [Pull request #191](https://github.com/gazebosim/gz-gui/pull/191)
 
-### Gazebo Gui 4.3.0 (2021-03-11)
+### Gazebo GUI 4.3.0 (2021-03-11)
 
 1. Screenshot plugin
     * [Pull request #170](https://github.com/gazebosim/gz-gui/pull/170)
@@ -369,7 +369,7 @@
 1. Add Windows Installation
     * [Pull request #168](https://github.com/gazebosim/gz-gui/pull/168)
 
-### Gazebo Gui 4.2.0 (2021-02-09)
+### Gazebo GUI 4.2.0 (2021-02-09)
 
 1. Added issue and PR templates
     * [Pull request 174](https://github.com/gazebosim/gz-gui/pull/174)
@@ -377,7 +377,7 @@
 1. Visualize single channel 8 bit image data
     * [Pull request 176](https://github.com/gazebosim/gz-gui/pull/176)
 
-### Gazebo Gui 4.1.1 (2021-01-05)
+### Gazebo GUI 4.1.1 (2021-01-05)
 
 1. Use default value of double ptr argv for CLI
     * [Pull request 165](https://github.com/gazebosim/gz-gui/pull/165)
@@ -385,7 +385,7 @@
 1. Generate valid topics depending on world name
     * [Pull request 164](https://github.com/gazebosim/gz-gui/pull/164)
 
-### Gazebo Gui 4.1.0 (2020-12-18)
+### Gazebo GUI 4.1.0 (2020-12-18)
 
 1. Publish plugin API docs
     * [Pull request 128](https://github.com/gazebosim/gz-gui/pull/128)
@@ -424,7 +424,7 @@
 1. Avoid crash on macOS
     * [Pull request 155](https://github.com/gazebosim/gz-gui/pull/155)
 
-### Gazebo Gui 4.0.0 (2020-09-29)
+### Gazebo GUI 4.0.0 (2020-09-29)
 
 1. GitHub migration
     * [Pull request 59](https://github.com/gazebosim/gz-gui/pull/59)
@@ -464,9 +464,9 @@
 1. Depend on ign-rendering4
     * [BitBucket pull request 243](https://osrf-migration.github.io/ignition-gh-pages/#!/ignitionrobotics/ign-gui/pull-requests/243)
 
-## Gazebo Gui 3
+## Gazebo GUI 3
 
-### Gazebo Gui 3.9.0 (2022-01-14)
+### Gazebo GUI 3.9.0 (2022-01-14)
 
 1. Added a button that allows shutting down both the client and server.
     * [Pull request #335](https://github.com/gazebosim/gz-gui/pull/335)
@@ -492,7 +492,7 @@
 1. Added log storing for `ign gui` CLI
     * [Pull request #272](https://github.com/gazebosim/gz-gui/pull/272)
 
-### Gazebo Gui 3.8.0 (2021-10-12)
+### Gazebo GUI 3.8.0 (2021-10-12)
 
 1. Improved doxygen
     * [Pull request #275](https://github.com/gazebosim/gz-gui/pull/275)
@@ -509,7 +509,7 @@
 1. New teleop plugin implementation.
     * [Pull request #245](https://github.com/gazebosim/gz-gui/pull/245)
 
-### Gazebo Gui 3.7.0 (2021-07-14)
+### Gazebo GUI 3.7.0 (2021-07-14)
 
 1. Fix codeowners
     * [Pull request #251](https://github.com/gazebosim/gz-gui/pull/251)
@@ -526,7 +526,7 @@
 1. Detect ign instead of using cmake module to check for ignition-tools
     * [Pull request #240](https://github.com/gazebosim/gz-gui/pull/240)
 
-### Gazebo Gui 3.6.0 (2021-06-17)
+### Gazebo GUI 3.6.0 (2021-06-17)
 
 1. Update codeowners
     * [Pull request #232](https://github.com/gazebosim/gz-gui/pull/232)
@@ -552,7 +552,7 @@
 1. `check_test_ran.py`: remove grep/xsltproc
     * [Pull request #203](https://github.com/gazebosim/gz-gui/pull/203)
 
-### Gazebo Gui 3.5.1 (2021-03-18)
+### Gazebo GUI 3.5.1 (2021-03-18)
 
 1. Scene3D: port mesh material fixes from ign-gazebo
     * [Pull request #191](https://github.com/gazebosim/gz-gui/pull/191)
@@ -560,7 +560,7 @@
 1. Improve the height of plugins in the right split
     * [Pull request #194](https://github.com/gazebosim/gz-gui/pull/194)
 
-### Gazebo Gui 3.5.0 (2021-03-10)
+### Gazebo GUI 3.5.0 (2021-03-10)
 
 1. Screenshot plugin
     * [Pull request #170](https://github.com/gazebosim/gz-gui/pull/170)
@@ -583,7 +583,7 @@
 1. Fix codecheck
     * [Pull request #157](https://github.com/gazebosim/gz-gui/pull/157)
 
-### Gazebo Gui 3.4.0 (2020-12-10)
+### Gazebo GUI 3.4.0 (2020-12-10)
 
 1. Publish plugin API docs
     * [Pull request 128](https://github.com/gazebosim/gz-gui/pull/128)
@@ -615,7 +615,7 @@
 1. Add right mouse events and tests
     * [Pull request 154](https://github.com/gazebosim/gz-gui/pull/154)
 
-### Gazebo Gui 3.3.0 (2020-08-31)
+### Gazebo GUI 3.3.0 (2020-08-31)
 
 1. rename key publisher plugin
     * [Pull request 93](https://github.com/gazebosim/gz-gui/pull/93)
@@ -660,7 +660,7 @@
 1. Fix ImageDisplay in Ubuntu 20.04
     * [Pull request 96](https://github.com/gazebosim/gz-gui/pull/96)
 
-### Gazebo Gui 3.2.0 (2020-06-22)
+### Gazebo GUI 3.2.0 (2020-06-22)
 
 1. Sort GUI plugins alphabetically
     * [Pull request 71](https://github.com/gazebosim/gz-gui/pull/71)
@@ -686,7 +686,7 @@
     * [Pull request 56](https://github.com/gazebosim/gz-gui/pull/56)
     * [Pull request 57](https://github.com/gazebosim/gz-gui/pull/57)
 
-### Gazebo Gui 3.1.0 (2020-03-27)
+### Gazebo GUI 3.1.0 (2020-03-27)
 
 1. Remove old ign-gui0 stuff
     * [BitBucket pull request 248](https://osrf-migration.github.io/ignition-gh-pages/#!/ignitionrobotics/ign-gui/pull-requests/248)
@@ -738,7 +738,7 @@
     * [BitBucket pull request 228](https://osrf-migration.github.io/ignition-gh-pages/#!/ignitionrobotics/ign-gui/pull-requests/228)
     * [BitBucket pull request 230](https://osrf-migration.github.io/ignition-gh-pages/#!/ignitionrobotics/ign-gui/pull-requests/230)
 
-### Gazebo Gui 3.0.0 (2019-12-10)
+### Gazebo GUI 3.0.0 (2019-12-10)
 
 1. Depend on ign-transport8 and ign-msgs5
     * [BitBucket pull request 225](https://osrf-migration.github.io/ignition-gh-pages/#!/ignitionrobotics/ign-gui/pull-requests/225)
@@ -746,9 +746,9 @@
 1. Depend on ign-rendering3
     * [BitBucket pull request 221](https://osrf-migration.github.io/ignition-gh-pages/#!/ignitionrobotics/ign-gui/pull-requests/221)
 
-## Gazebo Gui 2
+## Gazebo GUI 2
 
-### Gazebo Gui 2.3.3 (2020-08-31)
+### Gazebo GUI 2.3.3 (2020-08-31)
 
 1. Fix running plugins with bad world names.
     * [Pull request 111](https://github.com/gazebosim/gz-gui/pull/111)
@@ -756,17 +756,17 @@
 1. Disable more tests known to fail on macOS and Windows.
     * [Pull request 112](https://github.com/gazebosim/gz-gui/pull/112)
 
-### Gazebo Gui 2.3.2 (2020-08-19)
+### Gazebo GUI 2.3.2 (2020-08-19)
 
 1. Revert pull request #107
     * [Pull request 110](https://github.com/gazebosim/gz-gui/pull/110)
 
-### Gazebo Gui 2.3.1 (2020-08-17)
+### Gazebo GUI 2.3.1 (2020-08-17)
 
 1. Fix running plugins with bad world name
     * [Pull request 107](https://github.com/gazebosim/gz-gui/pull/107)
 
-### Gazebo Gui 2.3.0 (2020-08-11)
+### Gazebo GUI 2.3.0 (2020-08-11)
 
 1. Add shift + drag to rotate camera
     * [Pull request 96](https://github.com/gazebosim/gz-gui/pull/96)
@@ -787,7 +787,7 @@
 1. Use world name in default topics
     * [Pull request 104](https://github.com/gazebosim/gz-gui/pull/104)
 
-### Gazebo Gui 2.2.0 (2020-06-17)
+### Gazebo GUI 2.2.0 (2020-06-17)
 
 1. Sort GUI plugins alphabetically
     * [Pull request 71](https://github.com/gazebosim/gz-gui/pull/71)
@@ -812,7 +812,7 @@
     * [BitBucket pull request 249](https://osrf-migration.github.io/ignition-gh-pages/#!/ignitionrobotics/ign-gui/pull-requests/249)
 
 
-### Gazebo Gui 2.1.0 (2020-03-04)
+### Gazebo GUI 2.1.0 (2020-03-04)
 
 1. Add space for pausing sim
     * [BitBucket pull request 245](https://osrf-migration.github.io/ignition-gh-pages/#!/ignitionrobotics/ign-gui/pull-requests/245)
@@ -841,7 +841,7 @@
 1. Fix changing topics in ImageDisplay
     * [BitBucket pull request 224](https://osrf-migration.github.io/ignition-gh-pages/#!/ignitionrobotics/ign-gui/pull-requests/224)
 
-### Gazebo Gui 2.0.1
+### Gazebo GUI 2.0.1
 
 1. Made image display responsive.
     * [BitBucket pull request 223](https://osrf-migration.github.io/ignition-gh-pages/#!/ignitionrobotics/ign-gui/pull-requests/223)
@@ -849,7 +849,7 @@
 1. Downstream applications can override this using MainWindow::setIcon once they get the window.
     * [BitBucket pull request 222](https://osrf-migration.github.io/ignition-gh-pages/#!/ignitionrobotics/ign-gui/pull-requests/222)
 
-### Gazebo Gui 2.0.0
+### Gazebo GUI 2.0.0
 
 1. Delete QmlApplicationEngine later.
     * [BitBucket pull request 209](https://osrf-migration.github.io/ignition-gh-pages/#!/ignitionrobotics/ign-gui/pull-requests/209)
@@ -878,9 +878,9 @@
 1. Fix topic echo test and make msgs visible.
     * [BitBucket pull request 201](https://osrf-migration.github.io/ignition-gh-pages/#!/ignitionrobotics/ign-gui/pull-requests/201)
 
-## Gazebo Gui 1
+## Gazebo GUI 1
 
-### Gazebo Gui 1.X.X
+### Gazebo GUI 1.X.X
 
 1. Move files not ported to v1 to a separate dir for clarity.
     * [BitBucket pull request 196](https://osrf-migration.github.io/ignition-gh-pages/#!/ignitionrobotics/ign-gui/pull-requests/196)
@@ -888,4 +888,4 @@
 1. Get ign-gui plugin interface in case there are others.
     * [BitBucket pull request 186](https://osrf-migration.github.io/ignition-gh-pages/#!/ignitionrobotics/ign-gui/pull-requests/186)
 
-### Gazebo Gui 1.0.0
+### Gazebo GUI 1.0.0
diff --git a/include/gz/gui/config.hh.in b/include/gz/gui/config.hh.in
index a1e5adf15..66f7bedbd 100644
--- a/include/gz/gui/config.hh.in
+++ b/include/gz/gui/config.hh.in
@@ -28,7 +28,7 @@
 #define GZ_GUI_VERSION "${PROJECT_VERSION}"
 #define GZ_GUI_VERSION_FULL "${PROJECT_VERSION_FULL}"
 
-#define GZ_GUI_VERSION_HEADER "Gazebo Gui, version ${PROJECT_VERSION_FULL}\nCopyright (C) 2017 Open Source Robotics Foundation.\nReleased under the Apache 2.0 License.\n\n"
+#define GZ_GUI_VERSION_HEADER "Gazebo GUI, version ${PROJECT_VERSION_FULL}\nCopyright (C) 2017 Open Source Robotics Foundation.\nReleased under the Apache 2.0 License.\n\n"
 
 #define GZ_GUI_PLUGIN_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/${IGN_LIB_INSTALL_DIR}/ign-${IGN_DESIGNATION}-${PROJECT_VERSION_MAJOR}/plugins"
 
diff --git a/src/plugins/grid_config/GridConfig.hh b/src/plugins/grid_config/GridConfig.hh
index c41a7c454..adc04308e 100644
--- a/src/plugins/grid_config/GridConfig.hh
+++ b/src/plugins/grid_config/GridConfig.hh
@@ -29,7 +29,7 @@ namespace gui
 {
   class GridConfigPrivate;
 
-  /// \brief Manages grids in an Gazebo Rendering scene. This plugin can be
+  /// \brief Manages grids in a Gazebo Rendering scene. This plugin can be
   /// used for:
   /// * Introspecting grids
   /// * Editing grids
diff --git a/src/plugins/image_display/ImageDisplay.hh b/src/plugins/image_display/ImageDisplay.hh
index e9f2720f5..30e4f8fda 100644
--- a/src/plugins/image_display/ImageDisplay.hh
+++ b/src/plugins/image_display/ImageDisplay.hh
@@ -37,7 +37,7 @@ namespace plugins
 {
   class ImageDisplayPrivate;
 
-  /// \brief Display images coming through an Gazebo Transport topic.
+  /// \brief Display images coming through a Gazebo Transport topic.
   ///
   /// ## Configuration
   ///
diff --git a/src/plugins/minimal_scene/MinimalScene.hh b/src/plugins/minimal_scene/MinimalScene.hh
index 6f687c564..13b8267f4 100644
--- a/src/plugins/minimal_scene/MinimalScene.hh
+++ b/src/plugins/minimal_scene/MinimalScene.hh
@@ -43,7 +43,7 @@ namespace plugins
   /// It is possible to orbit the camera around the scene with
   /// the mouse. Use other plugins to manage objects in the scene.
   ///
-  /// Only one plugin displaying an Gazebo Rendering scene can be used at a
+  /// Only one plugin displaying a Gazebo Rendering scene can be used at a
   /// time.
   ///
   /// ## Configuration
diff --git a/src/plugins/navsat_map/NavSatMap.hh b/src/plugins/navsat_map/NavSatMap.hh
index 558234374..a07871d54 100644
--- a/src/plugins/navsat_map/NavSatMap.hh
+++ b/src/plugins/navsat_map/NavSatMap.hh
@@ -37,7 +37,7 @@ namespace plugins
 {
   class NavSatMapPrivate;
 
-  /// \brief Display NavSat messages coming through an Gazebo Transport topic
+  /// \brief Display NavSat messages coming through a Gazebo Transport topic
   /// on top of a map.
   ///
   /// ## Configuration
diff --git a/src/plugins/scene3d/Scene3D.hh b/src/plugins/scene3d/Scene3D.hh
index fd7ec1b6f..0068a00f7 100644
--- a/src/plugins/scene3d/Scene3D.hh
+++ b/src/plugins/scene3d/Scene3D.hh
@@ -46,7 +46,7 @@ namespace plugins
   /// It is possible to orbit the camera around the scene with
   /// the mouse. Use other plugins to manage objects in the scene.
   ///
-  /// Only one plugin displaying an Gazebo Rendering scene can be used at a
+  /// Only one plugin displaying a Gazebo Rendering scene can be used at a
   /// time.
   ///
   /// ## Configuration
diff --git a/src/plugins/topic_echo/TopicEcho.hh b/src/plugins/topic_echo/TopicEcho.hh
index e8a1ccf72..f335e2a2f 100644
--- a/src/plugins/topic_echo/TopicEcho.hh
+++ b/src/plugins/topic_echo/TopicEcho.hh
@@ -38,7 +38,7 @@ namespace plugins
 {
   class TopicEchoPrivate;
 
-  /// \brief Echo messages coming through an Gazebo Transport topic.
+  /// \brief Echo messages coming through a Gazebo Transport topic.
   ///
   /// ## Configuration
   /// This plugin doesn't accept any custom configuration.
diff --git a/src/plugins/transport_scene_manager/TransportSceneManager.hh b/src/plugins/transport_scene_manager/TransportSceneManager.hh
index b5ad073d7..d69ec624b 100644
--- a/src/plugins/transport_scene_manager/TransportSceneManager.hh
+++ b/src/plugins/transport_scene_manager/TransportSceneManager.hh
@@ -30,7 +30,7 @@ namespace plugins
 {
   class TransportSceneManagerPrivate;
 
-  /// \brief Provides an Gazebo Transport interface to
+  /// \brief Provides a Gazebo Transport interface to
   /// `gz::gui::plugins::MinimalScene`.
   ///
   /// ## Configuration
diff --git a/tutorials/03_plugins.md b/tutorials/03_plugins.md
index 2ffe6aad6..d556859b0 100644
--- a/tutorials/03_plugins.md
+++ b/tutorials/03_plugins.md
@@ -5,7 +5,7 @@ Previous Tutorial: \ref commandline
 
 ## Writing plugins
 
-An Gazebo GUI plugin is a shared library that defines a widget.
+A Gazebo GUI plugin is a shared library that defines a widget.
 The plugin contains [QML](https://doc.qt.io/qt-5/qtqml-index.html)
 code that specifies what the widget looks like, as well as C++ code
 that defines the plugin's behavior and ties it to other libraries.
@@ -32,7 +32,7 @@ tutorial for more information.
 
 ### Image display
 
-Display images from an Gazebo Transport topic.
+Display images from a Gazebo Transport topic.
 
     ign gui -c examples/config/image.config
 
@@ -42,7 +42,7 @@ or
 
 ### Publisher
 
-Publish messages on an Gazebo Transport topic.
+Publish messages on a Gazebo Transport topic.
 
 1. Listen to string messages on the `/echo` topic:
 
@@ -64,7 +64,7 @@ Publish messages on an Gazebo Transport topic.
 
 ### Topic echo
 
-Echo messages from an Gazebo Transport topic.
+Echo messages from a Gazebo Transport topic.
 
     ign gui -c examples/config/pubsub.config
 
diff --git a/tutorials/06_example.md b/tutorials/06_example.md
index 245b5343d..4580230a4 100644
--- a/tutorials/06_example.md
+++ b/tutorials/06_example.md
@@ -61,7 +61,7 @@ Now you can use the command line to open it:
 
 ## Configuration files
 
-Configuration files are used to load an Gazebo GUI window with several
+Configuration files are used to load a Gazebo GUI window with several
 plugins and custom window configurations.
 
 Example configuration files are provided in the `/examples/config` folder.