docs: various improvements (#940)

doc/source/getting_started/existing/index.rst

@@ -6,6 +6,13 @@ Use an existing session
 If a session of Discovery, SpaceClaim, or the Geometry service is already
 running, PyAnsys Geometry can be used to connect to it.
 
+.. warning::
+
+   Running a SpaceClaim or Discovery normal session will not suffice to be
+   able to use it with PyAnsys Geometry. Both products need the ApiServer extension to be
+   running. In this case, we recommend users to launch the products directly from the PyAnsys
+   Geometry library as shown in :ref:`ref_creating_local_session` to ease the process.
+
 Establish the connection
 ------------------------
 
@@ -15,7 +22,7 @@ From Python, establish a connection to the existing client session by creating a
 
     from ansys.geometry.core import Modeler
 
-    modeler = Modeler(host="localhost", port=5001)
+    modeler = Modeler(host="localhost", port=50051)
 
 If no error messages are received, your connection is established successfully.
 Note that your local port number might differ from the one shown in the preceding code.
@@ -29,7 +36,7 @@ connection inside your ``Modeler`` object:
 
    >>> modeler.client
    Ansys Geometry Modeler Client (...)
-   Target:     localhost:5001
+   Target:     localhost:50051
    Connection: Healthy
 
 .. button-ref:: ../index

doc/source/getting_started/local/index.rst

@@ -17,23 +17,23 @@ either Discovery, SpaceClaim, or the Geometry service.
 
           from ansys.geometry.core import launch_modeler_with_discovery
 
-          modeler_discovery = launch_modeler_with_discovery()
+          modeler = launch_modeler_with_discovery()
 
     .. tab-item:: SpaceClaim
 
        .. code:: python
 
           from ansys.geometry.core import launch_modeler_with_spaceclaim
 
-          modeler_discovery = launch_modeler_with_spaceclaim()
+          modeler = launch_modeler_with_spaceclaim()
 
     .. tab-item:: Geometry service
 
        .. code:: python
 
           from ansys.geometry.core import launch_modeler_with_geometry_service
 
-          modeler_discovery = launch_modeler_with_geometry_service()
+          modeler = launch_modeler_with_geometry_service()
 
 
 For more information on the arguments accepted by the launcher methods, see