diff --git a/vignettes/v00_teaching_hydrology.rmd b/vignettes/v00_teaching_hydrology.rmd
index 4898b2f60820fa5b8271e10eda6e87dfb8f81788..76a38c09133b8d95bc8137cd6baf22ed3e35e2e1 100644
--- a/vignettes/v00_teaching_hydrology.rmd
+++ b/vignettes/v00_teaching_hydrology.rmd
@@ -8,7 +8,7 @@ output:
   rmarkdown::html_vignette:
 vignette: >
   %\VignetteEngine{knitr::rmarkdown}
-  %\VignetteIndexEntry{Teaching hydrology with airGRteaching}
+  %\VignetteIndexEntry{Ex. 0. Teaching hydrology with airGRteaching}
   %\VignetteEncoding{UTF-8}
 ---
 
diff --git a/vignettes/v01_EN_flow_reconstruction.rmd b/vignettes/v01_EN_flow_reconstruction.rmd
index aaac7da3c98282132f3f646452197bffccb3d5c9..70e3900c6eac6cb3dd0e8162900f1c3ac6f5e711 100644
--- a/vignettes/v01_EN_flow_reconstruction.rmd
+++ b/vignettes/v01_EN_flow_reconstruction.rmd
@@ -8,7 +8,7 @@ output:
   rmarkdown::html_vignette
 vignette: >
   %\VignetteEngine{knitr::rmarkdown}
-  %\VignetteIndexEntry{Streamflow reconstruction}
+  %\VignetteIndexEntry{Ex. 1. Streamflow reconstruction}
   %\VignetteEncoding{UTF-8}
 ---
 
diff --git a/vignettes/v01_FR_flow_reconstruction.rmd b/vignettes/v01_FR_flow_reconstruction.rmd
index 1070daf77c6608c9d321c03a3611cc3ca4512784..ef39d02a55df2f11b23b6e01547edf032ded4f42 100644
--- a/vignettes/v01_FR_flow_reconstruction.rmd
+++ b/vignettes/v01_FR_flow_reconstruction.rmd
@@ -8,7 +8,7 @@ output:
   rmarkdown::html_vignette
 vignette: >
   %\VignetteEngine{knitr::rmarkdown}
-  %\VignetteIndexEntry{Reconstitution de débits}
+  %\VignetteIndexEntry{Ex. 1. Reconstitution de débits}
   %\VignetteEncoding{UTF-8}
 ---
 
diff --git a/vignettes/v02_EN_flow_forecasting.rmd b/vignettes/v02_EN_flow_forecasting.rmd
index 6871953423f4c4de49a5612af0e106bda9d34f8c..ff91e72e8c748949e81b4282fc0a84513df94b9e 100644
--- a/vignettes/v02_EN_flow_forecasting.rmd
+++ b/vignettes/v02_EN_flow_forecasting.rmd
@@ -8,7 +8,7 @@ output:
   rmarkdown::html_vignette
 vignette: >
   %\VignetteEngine{knitr::rmarkdown}
-  %\VignetteIndexEntry{Low-flow forecasting}
+  %\VignetteIndexEntry{Ex. 2. Low-flow forecasting}
   %\VignetteEncoding{UTF-8}
 ---
 
diff --git a/vignettes/v02_FR_flow_forecasting.rmd b/vignettes/v02_FR_flow_forecasting.rmd
index 1162289c869aefca5b4b12217487e987cdaec44c..ee5fced09723564ab7133515adabcf30cfffcc75 100644
--- a/vignettes/v02_FR_flow_forecasting.rmd
+++ b/vignettes/v02_FR_flow_forecasting.rmd
@@ -8,7 +8,7 @@ output:
   rmarkdown::html_vignette
 vignette: >
   %\VignetteEngine{knitr::rmarkdown}
-  %\VignetteIndexEntry{Prévision de bas débits}
+  %\VignetteIndexEntry{Ex. 2. Prévision de bas débits}
   %\VignetteEncoding{UTF-8}
 ---
 
diff --git a/vignettes/v03_EN_impact_CC_flow.rmd b/vignettes/v03_EN_impact_CC_flow.rmd
index 1801fb5af743eb7d95ad7175c76d66979d0d3ede..606eb37a04da62b8e01309a16d9fb2a4d979db7b 100644
--- a/vignettes/v03_EN_impact_CC_flow.rmd
+++ b/vignettes/v03_EN_impact_CC_flow.rmd
@@ -8,7 +8,7 @@ output:
   rmarkdown::html_vignette:
 vignette: >
   %\VignetteEngine{knitr::rmarkdown}
-  %\VignetteIndexEntry{Impact of climate change on streamflow regime}
+  %\VignetteIndexEntry{Ex. 3. Impact of climate change on streamflow regime}
   %\VignetteEncoding{UTF-8}
 ---
 
diff --git a/vignettes/v03_FR_impact_CC_flow.rmd b/vignettes/v03_FR_impact_CC_flow.rmd
index 9a8a46201e55f887ffff07c93489a69e640d60ab..0320b6401887b080fd28c6d27233a4ba97daa044 100644
--- a/vignettes/v03_FR_impact_CC_flow.rmd
+++ b/vignettes/v03_FR_impact_CC_flow.rmd
@@ -8,7 +8,7 @@ output:
   rmarkdown::html_vignette
 vignette: >
   %\VignetteEngine{knitr::rmarkdown}
-  %\VignetteIndexEntry{Impact du changement climatique sur le régime des débits}
+  %\VignetteIndexEntry{Ex. 3. Impact du changement climatique sur le régime des débits}
   %\VignetteEncoding{UTF-8}
 ---