diff --git a/Boolean_set_operations_2/doc/Boolean_set_operations_2/CGAL/draw_polygon_set_2.h b/Boolean_set_operations_2/doc/Boolean_set_operations_2/CGAL/draw_polygon_set_2.h
index a4b5033f472..df7a777dbdc 100644
--- a/Boolean_set_operations_2/doc/Boolean_set_operations_2/CGAL/draw_polygon_set_2.h
+++ b/Boolean_set_operations_2/doc/Boolean_set_operations_2/CGAL/draw_polygon_set_2.h
@@ -4,7 +4,7 @@ namespace CGAL {
 \ingroup PkgDrawPolygonSet2
 
 opens a new window and draws `aps`, an instance of the `CGAL::Polygon_set_2` class. A call to this function is blocking, that is the program continues as soon as the user closes the window. This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 \tparam PS an instance of the `CGAL::Polygon_set_2` class.
 \param aps the polygon set to draw.
 
diff --git a/Boolean_set_operations_2/include/CGAL/draw_polygon_set_2.h b/Boolean_set_operations_2/include/CGAL/draw_polygon_set_2.h
index 0cfd3275195..f74834d250b 100644
--- a/Boolean_set_operations_2/include/CGAL/draw_polygon_set_2.h
+++ b/Boolean_set_operations_2/include/CGAL/draw_polygon_set_2.h
@@ -26,7 +26,7 @@ namespace CGAL {
 \ingroup PkgDrawPolygonSet2
 
 opens a new window and draws `aps`, an instance of the `CGAL::Polygon_set_2` class. A call to this function is blocking, that is the program continues as soon as the user closes the window. This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 \tparam PS an instance of the `CGAL::Polygon_set_2` class.
 \param aps the polygon set to draw.
 
diff --git a/Linear_cell_complex/doc/Linear_cell_complex/CGAL/draw_linear_cell_complex.h b/Linear_cell_complex/doc/Linear_cell_complex/CGAL/draw_linear_cell_complex.h
index e6cdf2a4eeb..0e0d2f392b5 100644
--- a/Linear_cell_complex/doc/Linear_cell_complex/CGAL/draw_linear_cell_complex.h
+++ b/Linear_cell_complex/doc/Linear_cell_complex/CGAL/draw_linear_cell_complex.h
@@ -4,7 +4,7 @@ namespace CGAL {
 \ingroup PkgDrawLinearCellComplex
 
 opens a new window and draws `alcc`, a model of the `LinearCellComplex` concept. A call to this function is blocking, that is the program continues as soon as the user closes the window. This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 \tparam LCC a model of the `LinearCellComplex` concept.
 \param alcc the linear cell complex to draw.
 
diff --git a/Linear_cell_complex/doc/Linear_cell_complex/Linear_cell_complex.txt b/Linear_cell_complex/doc/Linear_cell_complex/Linear_cell_complex.txt
index bc353dfeef0..57739a38d1e 100644
--- a/Linear_cell_complex/doc/Linear_cell_complex/Linear_cell_complex.txt
+++ b/Linear_cell_complex/doc/Linear_cell_complex/Linear_cell_complex.txt
@@ -258,7 +258,7 @@ A linear cell complex can be visualized by calling the \link PkgDrawLinearCellCo
 \cgalExample{Linear_cell_complex/draw_linear_cell_complex.cpp}
 
 This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 
 \cgalFigureBegin{fig_draw_lcc,draw_lcc.png}
 Result of the run of the draw_linear_cell_complex program. A window shows two 3D cubes and allows to navigate through the 3D scene.
diff --git a/Nef_3/doc/Nef_3/CGAL/draw_nef_3.h b/Nef_3/doc/Nef_3/CGAL/draw_nef_3.h
index abc1e12a879..f65883f8405 100644
--- a/Nef_3/doc/Nef_3/CGAL/draw_nef_3.h
+++ b/Nef_3/doc/Nef_3/CGAL/draw_nef_3.h
@@ -5,7 +5,7 @@ namespace CGAL {
 
 Open a new window and draws `anef3`, the `Nef_polyhedron_3`. A call to this function is blocking, that is the program continues as soon as the user closes the window.
 This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 \tparam Nef3 a model of the `Nef_polyhedron_3` concept.
 \param anef3 the nef polyhedron to draw.
 
@@ -13,4 +13,4 @@ Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5
 template<class Nef3>
 void draw(const Nef3& anef3);
 
-} /* namespace CGAL */
\ No newline at end of file
+} /* namespace CGAL */
diff --git a/Nef_3/doc/Nef_3/Nef_3.txt b/Nef_3/doc/Nef_3/Nef_3.txt
index d1cd936769d..60e98f18864 100644
--- a/Nef_3/doc/Nef_3/Nef_3.txt
+++ b/Nef_3/doc/Nef_3/Nef_3.txt
@@ -425,7 +425,7 @@ A nef polyhedron can be visualised by calling the \link PkgDrawNef3 CGAL::draw<N
 \cgalExample{Nef_3/draw_nef_3.cpp}
 
 This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 
 \cgalFigureBegin{fig_draw_nef_polyhedron, draw_nef_3.png}
 Result of the run  of the draw_nef_3 program. A window shows the nef polyhedron and allows to navigate through the 3D scene.
diff --git a/Periodic_2_triangulation_2/doc/Periodic_2_triangulation_2/CGAL/draw_periodic_2_triangulation_2.h b/Periodic_2_triangulation_2/doc/Periodic_2_triangulation_2/CGAL/draw_periodic_2_triangulation_2.h
index e71738e78a5..0bf8e1b6fe6 100644
--- a/Periodic_2_triangulation_2/doc/Periodic_2_triangulation_2/CGAL/draw_periodic_2_triangulation_2.h
+++ b/Periodic_2_triangulation_2/doc/Periodic_2_triangulation_2/CGAL/draw_periodic_2_triangulation_2.h
@@ -5,7 +5,7 @@ namespace CGAL {
 
 opens a new window and draws `ap2t2`, the `Periodic_2_Triangulation_2`. A call to this function is blocking, that is the program continues as soon as the user closes the window.
 This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 \tparam P2T2 a model of the `Periodic_2TriangulationTraits_2` concept.
 \param ap2t2 the 2D periodic trinagulation to draw.
 
diff --git a/Point_set_3/doc/Point_set_3/Point_set_3.txt b/Point_set_3/doc/Point_set_3/Point_set_3.txt
index 0372b9b987b..449e557d88e 100644
--- a/Point_set_3/doc/Point_set_3/Point_set_3.txt
+++ b/Point_set_3/doc/Point_set_3/Point_set_3.txt
@@ -170,7 +170,7 @@ A 3D point set can be visualized by calling the \link PkgDrawPointSet3D CGAL::dr
 \cgalExample{Point_set_3/draw_point_set_3.cpp}
 
 This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 
 \cgalFigureBegin{fig_draw_point_set,draw_point_set.png}
 Result of the run of the draw_point_set_3 program. A window shows the 3D points and allows to navigate through the 3D scene.
diff --git a/Point_set_3/include/CGAL/draw_point_set_3.h b/Point_set_3/include/CGAL/draw_point_set_3.h
index 3d6271964c9..edecd4572fb 100644
--- a/Point_set_3/include/CGAL/draw_point_set_3.h
+++ b/Point_set_3/include/CGAL/draw_point_set_3.h
@@ -23,7 +23,7 @@ namespace CGAL {
 \ingroup PkgDrawPointSet3D
 
 opens a new window and draws `aps`, an instance of the `CGAL::Point_set_3` class. A call to this function is blocking, that is the program continues as soon as the user closes the window. This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 \tparam PS an instance of the `CGAL::Point_set_3` class.
 \param aps the point set to draw.
 
diff --git a/Polygon/doc/Polygon/Polygon.txt b/Polygon/doc/Polygon/Polygon.txt
index f64ea3e00df..824b0d9fbb0 100644
--- a/Polygon/doc/Polygon/Polygon.txt
+++ b/Polygon/doc/Polygon/Polygon.txt
@@ -77,7 +77,7 @@ A polygon can be visualized by calling the \link  PkgDrawPolygon2 CGAL::draw<P>(
 \cgalExample{Polygon/draw_polygon.cpp}
 
 This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 
 \cgalFigureBegin{fig_draw_polygon,draw_polygon.png}
 Result of the run of the draw_polygon program. A window shows the polygon and allows to navigate through the scene.
diff --git a/Polygon/include/CGAL/draw_polygon_2.h b/Polygon/include/CGAL/draw_polygon_2.h
index b38f04ce33d..0e50e967fdb 100644
--- a/Polygon/include/CGAL/draw_polygon_2.h
+++ b/Polygon/include/CGAL/draw_polygon_2.h
@@ -26,7 +26,7 @@ namespace CGAL {
 \ingroup PkgDrawPolygon2
 
 opens a new window and draws `ap`, an instance of the `CGAL::Polygon_2` class. A call to this function is blocking, that is the program continues as soon as the user closes the window. This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 \tparam P an instance of the `CGAL::Polygon_2` class.
 \param ap the polygon to draw.
 
diff --git a/Polygon/include/CGAL/draw_polygon_with_holes_2.h b/Polygon/include/CGAL/draw_polygon_with_holes_2.h
index 353c6b90128..fd2ab34a7e5 100644
--- a/Polygon/include/CGAL/draw_polygon_with_holes_2.h
+++ b/Polygon/include/CGAL/draw_polygon_with_holes_2.h
@@ -26,7 +26,7 @@ namespace CGAL {
 \ingroup PkgDrawPolygonWithHoles2
 
 opens a new window and draws `aph`, an instance of the `CGAL::Polygon_with_holes_2` class. A call to this function is blocking, that is the program continues as soon as the user closes the window. This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 \tparam PH an instance of the `CGAL::Polygon_with_holes_2` class.
 \param aph the polygon with holes to draw.
 
diff --git a/Polyhedron/doc/Polyhedron/CGAL/draw_polyhedron.h b/Polyhedron/doc/Polyhedron/CGAL/draw_polyhedron.h
index f26dfb7587c..3ce65574799 100644
--- a/Polyhedron/doc/Polyhedron/CGAL/draw_polyhedron.h
+++ b/Polyhedron/doc/Polyhedron/CGAL/draw_polyhedron.h
@@ -4,7 +4,7 @@ namespace CGAL {
 \ingroup PkgDrawPolyhedron
 
 opens a new window and draws `apoly`, an instance of the `CGAL::Polyhedron_3` class. A call to this function is blocking, that is the program continues as soon as the user closes the window. This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 \tparam POLY an instance of the `CGAL::Polyhedron_3` class.
 \param apoly the polyhedron to draw.
 
diff --git a/Polyhedron/doc/Polyhedron/Polyhedron.txt b/Polyhedron/doc/Polyhedron/Polyhedron.txt
index b9e3865457c..5526de883c3 100644
--- a/Polyhedron/doc/Polyhedron/Polyhedron.txt
+++ b/Polyhedron/doc/Polyhedron/Polyhedron.txt
@@ -283,7 +283,7 @@ A polyhedron can be visualized by calling the \link PkgDrawPolyhedron CGAL::draw
 \cgalExample{Polyhedron/draw_polyhedron.cpp}
 
 This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 
 \cgalFigureBegin{fig_draw_polyhedron,draw_polyhedron.png}
 Result of the run of the draw_polyhedron program. A window shows the polyhedron and allows to navigate through the 3D scene.
diff --git a/Surface_mesh/doc/Surface_mesh/Surface_mesh.txt b/Surface_mesh/doc/Surface_mesh/Surface_mesh.txt
index f8a51ee5e5a..9890f1c64d5 100644
--- a/Surface_mesh/doc/Surface_mesh/Surface_mesh.txt
+++ b/Surface_mesh/doc/Surface_mesh/Surface_mesh.txt
@@ -380,7 +380,7 @@ A surface mesh can be visualized by calling the \link PkgDrawSurfaceMesh CGAL::d
 \cgalExample{Surface_mesh/draw_surface_mesh.cpp}
 
 This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 
 \cgalFigureBegin{fig_draw_surface_mesh,draw_surface_mesh.png}
 Result of the run of the draw_surface_mesh program. A window shows the surface mesh and allows to navigate through the 3D scene.
diff --git a/Surface_mesh/include/CGAL/draw_surface_mesh.h b/Surface_mesh/include/CGAL/draw_surface_mesh.h
index 7addf188c26..6f34dfefc44 100644
--- a/Surface_mesh/include/CGAL/draw_surface_mesh.h
+++ b/Surface_mesh/include/CGAL/draw_surface_mesh.h
@@ -18,7 +18,7 @@
 \ingroup PkgDrawSurfaceMesh
 
 Open a new window and draw `asm`, an instance of the `CGAL::Surface_mesh` class. The function is blocking, that is the program continues as soon as the user closes the window. This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 \tparam SM an instance of the `CGAL::Surface_mesh` class.
 \param asm the surface mesh to draw.
 
diff --git a/Triangulation_2/doc/Triangulation_2/CGAL/draw_triangulation_2.h b/Triangulation_2/doc/Triangulation_2/CGAL/draw_triangulation_2.h
index d26389b28e8..2ecef01ac43 100644
--- a/Triangulation_2/doc/Triangulation_2/CGAL/draw_triangulation_2.h
+++ b/Triangulation_2/doc/Triangulation_2/CGAL/draw_triangulation_2.h
@@ -4,7 +4,7 @@ namespace CGAL {
 \ingroup PkgDrawTriangulation2
 
 opens a new window and draws `at2`, a model of the `TriangulationDataStructure_2` concept. A call to this function is blocking, that is the program continues as soon as the user closes the window. This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 \tparam T2 a model of the `TriangulationDataStructure_2` concept.
 \param at2 the triangulation to draw.
 
diff --git a/Triangulation_2/doc/Triangulation_2/Triangulation_2.txt b/Triangulation_2/doc/Triangulation_2/Triangulation_2.txt
index af88a67afd4..641b2095e10 100644
--- a/Triangulation_2/doc/Triangulation_2/Triangulation_2.txt
+++ b/Triangulation_2/doc/Triangulation_2/Triangulation_2.txt
@@ -510,7 +510,7 @@ A 2D triangulation can be visualized by calling the \link PkgDrawTriangulation2
 \cgalExample{Triangulation_2/draw_triangulation_2.cpp}
 
 This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 
 \cgalFigureBegin{fig_draw_triangulation_2,draw_triangulation_2.png}
 Result of the run of the draw_triangulation_2 program. A window shows the 2D triangulation and allows to navigate through the scene.
diff --git a/Triangulation_3/doc/Triangulation_3/CGAL/draw_triangulation_3.h b/Triangulation_3/doc/Triangulation_3/CGAL/draw_triangulation_3.h
index 7968767d7eb..266e73dcca2 100644
--- a/Triangulation_3/doc/Triangulation_3/CGAL/draw_triangulation_3.h
+++ b/Triangulation_3/doc/Triangulation_3/CGAL/draw_triangulation_3.h
@@ -4,7 +4,7 @@ namespace CGAL {
 \ingroup PkgDrawTriangulation3
 
 opens a new window and draws `at3`, a model of the `TriangulationDataStructure_3` concept. A call to this function is blocking, that is the program continues as soon as the user closes the window. This function requires CGAL_Qt5, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 \tparam T3 a model of the `TriangulationDataStructure_3` concept.
 \param at3 the triangulation to draw.
 
diff --git a/Triangulation_3/doc/Triangulation_3/Triangulation_3.txt b/Triangulation_3/doc/Triangulation_3/Triangulation_3.txt
index 1347589400a..54b01bdaa9b 100644
--- a/Triangulation_3/doc/Triangulation_3/Triangulation_3.txt
+++ b/Triangulation_3/doc/Triangulation_3/Triangulation_3.txt
@@ -570,7 +570,7 @@ A 3D triangulation can be visualized by calling the \link PkgDrawTriangulation3
 \cgalExample{Triangulation_3/draw_triangulation_3.cpp}
 
 This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 
 \cgalFigureBegin{fig_draw_triangulation_3,draw_triangulation_3.png}
 Result of the run of the draw_triangulation_3 program. A window shows the 3D triangulation and allows to navigate through the 3D scene.
diff --git a/Voronoi_diagram_2/doc/Voronoi_diagram_2/CGAL/draw_voronoi_diagram_2.h b/Voronoi_diagram_2/doc/Voronoi_diagram_2/CGAL/draw_voronoi_diagram_2.h
index 260ec7ad3bc..1eb06f9c353 100644
--- a/Voronoi_diagram_2/doc/Voronoi_diagram_2/CGAL/draw_voronoi_diagram_2.h
+++ b/Voronoi_diagram_2/doc/Voronoi_diagram_2/CGAL/draw_voronoi_diagram_2.h
@@ -7,7 +7,7 @@ opens a new window and draws `av2`, the `Voronoi_diagram_2` constructed from a D
 The class `Voronoi_diagram_2` provides an adaptor to view a triangulated Delaunay graph as their dual subdivision, the
 Voronoi diagram. A call to this function is blocking, that is the program continues as soon as the user closes the window.
 This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 \tparam V2 a model of the `AdaptationTraits_2` concept.
 \param av2 the voronoi diagram to draw.
 
diff --git a/Voronoi_diagram_2/doc/Voronoi_diagram_2/Voronoi_diagram_2.txt b/Voronoi_diagram_2/doc/Voronoi_diagram_2/Voronoi_diagram_2.txt
index e0a235fe4d3..26640ab6d16 100644
--- a/Voronoi_diagram_2/doc/Voronoi_diagram_2/Voronoi_diagram_2.txt
+++ b/Voronoi_diagram_2/doc/Voronoi_diagram_2/Voronoi_diagram_2.txt
@@ -494,7 +494,7 @@ A 2D Voronoi Diagram can be visualized by calling the \link PkgDrawVoronoiDiagra
 shown in the following example. This function opens a new window showing the Voronoi Diagram of the given input sites/vertix locations. A call to this function is blocking, that is the program continues as soon as the user closes the window.
 
 This function requires `CGAL_Qt5`, and is only available if the macro `CGAL_USE_BASIC_VIEWER` is defined.
-Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` add the definition.
+Linking with the cmake target `CGAL::CGAL_Basic_viewer` will link with `CGAL_Qt5` and add the definition `CGAL_USE_BASIC_VIEWER`.
 
 \cgalExample{Voronoi_diagram_2/draw_voronoi_diagram_2.cpp}