diff --git a/pages/documentation/grid/formats/cim-cgmes.md b/pages/documentation/grid/formats/cim-cgmes.md
index 2d59e7ad..8a9e0a73 100644
--- a/pages/documentation/grid/formats/cim-cgmes.md
+++ b/pages/documentation/grid/formats/cim-cgmes.md
@@ -458,6 +458,7 @@ These properties can be defined in the configuration file in the [import-export-
 
 **iidm.import.cgmes.boundary-location**  
 Optional property that defines the directory path where the CGMES importer can find the boundary files (`EQBD` and `TPBD` profiles) if they are not present in the imported zip file. By default, its value is `<ITOOLS_CONFIG_DIR>/CGMES/boundary`.
+This property can also be used at CGMES export if the network was not imported from a CGMES to indicate the boundary files that should be used for reference.
 
 **iidm.import.cgmes.convert-boundary**  
 Optional property that defines if the equipment located inside the boundary are imported as part of the network. Used for debugging purposes. `false` by default.
@@ -668,11 +669,13 @@ By default, the base name is the network's name if it exists, or else the networ
 
 **iidm.export.cgmes.boundary-eq-id**  
 Optional property that defines the ID of the EQ-BD model if there is any.
-Its default value is `null`: we consider there is no EQ-BD model to consider.
+Its default value is `null`: we consider there is no EQ-BD model to consider. 
+If this property is defined, then this ID will be written in the header of the exported EQ file.
 
 **iidm.export.cgmes.boundary-tp-id**  
 Optional property that defines the ID of the TP-BD model if there is any.
 Its default value is `null`: we consider there is no TP-BD model to consider.
+If this property is defined, then this ID will be written in the header of the exported SV file.
 
 **iidm.export.cgmes.cim-version**  
 Optional property that defines the CIM version number in which the user wants the CGMES files to be exported.
@@ -751,6 +754,9 @@ Its default value is 1.
 The business process in which the export takes place. This is used to generate unique UUIDs for the EQ, TP, SSH and SV file `FullModel`.
 Its default value is `1D`.
 
+
+Note that if you are exporting a network that does not come from CGMES, you can use the [`iidm.import.cgmes.boundary-location`](#options) property to define the location of the boundary files to use as reference.
+
 ## Examples
 Have a look to the [CGMES sample files](https://www.entsoe.eu/Documents/CIM_documents/Grid_Model_CIM/TestConfigurations_packageCASv2.0.zip)
 from ENTSO-E Test Configurations for Conformity Assessment Scheme v2.0.