diff --git a/session_1/session_1.Rmd b/session_1/session_1.Rmd
index 5706d045327bf6376e6935326a2ffa744fbf4c58..4586fd4b6433071848cc6ae03ed4f1f2913eecde 100644
--- a/session_1/session_1.Rmd
+++ b/session_1/session_1.Rmd
@@ -2,43 +2,18 @@
 title: 'R.1: Introduction to R and RStudio'
 author: "Laurent Modolo [laurent.modolo@ens-lyon.fr](mailto:laurent.modolo@ens-lyon.fr);\n Hélène Polvèche [hpolveche@istem.fr](mailto:hpolveche@istem.fr)"
 date: "2022"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "../www/style_Rmd.css"
 ---
 
 ```{r include=FALSE}
 library(fontawesome)
 ``` 
 
- `r fa(name = "fas fa-house", fill = "grey", height = "1em")`  https://can.gitbiopages.ens-lyon.fr/R_basis/
-
 ```{r setup, include=FALSE , echo=FALSE}
 rm(list=ls())
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
 ```
 
-```{r klippy_install, echo=FALSE, include=FALSE}
-if (! require("klippy")) {
-  install.packages("remotes")
-  remotes::install_github("rlesur/klippy")
-}
-```
-
-
-```{r klippy, echo=FALSE, include=TRUE}
-klippy::klippy(
-  position = c('top', 'right'),
-  color = "white",
-  tooltip_message = 'Click to copy',
-  tooltip_success = 'Copied !')
-```
-
 
 # Introduction
 
diff --git a/session_2/session_2.Rmd b/session_2/session_2.Rmd
index f1f1ae348818699a1f8520b36db0224be0fef8fb..3957e32fe4515bde3dd2ef769c0871e10d50ca4e 100644
--- a/session_2/session_2.Rmd
+++ b/session_2/session_2.Rmd
@@ -2,33 +2,21 @@
 title: "R.2: introduction to Tidyverse"
 author: "Laurent Modolo [laurent.modolo@ens-lyon.fr](mailto:laurent.modolo@ens-lyon.fr);\nHélène Polvèche [hpolveche@istem.fr](mailto:hpolveche@istem.fr)"
 date: "2022"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "../www/style_Rmd.css"
 ---
 
 ```{r include=FALSE}
 library(fontawesome)
-``` 
 
- `r fa(name = "fas fa-house", fill = "grey", height = "1em")`  https://can.gitbiopages.ens-lyon.fr/R_basis/
+if("conflicted" %in% .packages())
+    conflicted::conflicts_prefer(dplyr::filter)
+``` 
 
 ```{r setup, include=FALSE}
 rm(list=ls())
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
 ```
-```{r klippy, echo=FALSE, include=TRUE}
-klippy::klippy(
-  position = c('top', 'right'),
-  color = "white",
-  tooltip_message = 'Click to copy',
-  tooltip_success = 'Copied !')
-```
+
 ```{r download_data, include=FALSE, eval=T}
 library("tidyverse")
 tmp <- tempfile(fileext = ".zip")
diff --git a/session_3/session_3.Rmd b/session_3/session_3.Rmd
index d13d3d6d762b653baff64ffe67ba24fa913e7bcb..8e07389386e5e2b4e6984d2b5b3bebac07d01831 100644
--- a/session_3/session_3.Rmd
+++ b/session_3/session_3.Rmd
@@ -2,33 +2,17 @@
 title: 'R.3: Transformations with ggplot2'
 author: "Laurent Modolo [laurent.modolo@ens-lyon.fr](mailto:laurent.modolo@ens-lyon.fr), Hélène Polvèche [hpolveche@istem.fr](mailto:hpolveche@istem.fr)"
 date: "2022"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "../www/style_Rmd.css"
 ---
 
 ```{r include=FALSE}
 library(fontawesome)
 ``` 
 
-&ensp;`r fa(name = "fas fa-house", fill = "grey", height = "1em")` &ensp;https://can.gitbiopages.ens-lyon.fr/R_basis/
-
 ```{r setup, include=FALSE}
 rm(list=ls())
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
 ```
-```{r klippy, echo=FALSE, include=TRUE}
-klippy::klippy(
-  position = c('top', 'right'),
-  color = "white",
-  tooltip_message = 'Click to copy',
-  tooltip_success = 'Copied !')
-```
 
 # Introduction
 
diff --git a/session_4/session_4.Rmd b/session_4/session_4.Rmd
index 1839c1aae4c03eb9a11486ead39e6d60a178658b..d22517b23dc67f9a427622ffd73fc6dcc25e87f0 100644
--- a/session_4/session_4.Rmd
+++ b/session_4/session_4.Rmd
@@ -2,33 +2,20 @@
 title: "R.4: data transformation"
 author: "Laurent Modolo [laurent.modolo@ens-lyon.fr](mailto:laurent.modolo@ens-lyon.fr), Hélène Polvèche [hpolveche@istem.fr](mailto:hpolveche@istem.fr)"
 date: "2022"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "../www/style_Rmd.css"
 ---
 
 ```{r include=FALSE}
 library(fontawesome)
-``` 
 
-&ensp;`r fa(name = "fas fa-house", fill = "grey", height = "1em")` &ensp;https://can.gitbiopages.ens-lyon.fr/R_basis/
+if("conflicted" %in% .packages())
+    conflicted::conflicts_prefer(dplyr::filter)
+``` 
 
 ```{r setup, include=FALSE}
 rm(list=ls())
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
 ```
-```{r klippy, echo=FALSE, include=TRUE}
-klippy::klippy(
-  position = c('top', 'right'),
-  color = "white",
-  tooltip_message = 'Click to copy',
-  tooltip_success = 'Copied !')
-```
 
 # Introduction
 
diff --git a/session_5/session_5.Rmd b/session_5/session_5.Rmd
index 16aed13072f41788ee217e7c9e3e7a7efc09611d..33d98c510920a9baebc08ac5b6d644a62cda0a96 100644
--- a/session_5/session_5.Rmd
+++ b/session_5/session_5.Rmd
@@ -1,34 +1,21 @@
 ---
-title: "R#5: Pipping and grouping"
+title: "R.5: Pipping and grouping"
 author: "Laurent Modolo [laurent.modolo@ens-lyon.fr](mailto:laurent.modolo@ens-lyon.fr)"
 date: "2022"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "../www/style_Rmd.css"
 ---
 
 ```{r include=FALSE}
 library(fontawesome)
-``` 
 
-&ensp;`r fa(name = "fas fa-house", fill = "grey", height = "1em")` &ensp;https://can.gitbiopages.ens-lyon.fr/R_basis/
+if("conflicted" %in% .packages())
+    conflicted::conflicts_prefer(dplyr::filter)
+```
 
 ```{r setup, include=FALSE}
 rm(list=ls())
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
 ```
-```{r klippy, echo=FALSE, include=TRUE}
-klippy::klippy(
-  position = c('top', 'right'),
-  color = "white",
-  tooltip_message = 'Click to copy',
-  tooltip_success = 'Copied !')
-```
 
 # Introduction
 
diff --git a/session_6/session_6.Rmd b/session_6/session_6.Rmd
index f159cc769c7c8ea3ca3b0ab1c032878a9deff9f5..5188b939c56e27b787f8caa5d369b00d5a941cd3 100644
--- a/session_6/session_6.Rmd
+++ b/session_6/session_6.Rmd
@@ -2,34 +2,17 @@
 title: "R.6: tidydata"
 author: "Laurent Modolo [laurent.modolo@ens-lyon.fr](mailto:laurent.modolo@ens-lyon.fr);\nCarine Rey [carine.rey@ens-lyon.fr](mailto:carine.rey@ens-lyon.fr)"
 date: "2022"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "../www/style_Rmd.css"
 ---
 
 ```{r include=FALSE}
 library(fontawesome)
 ``` 
 
-&ensp;`r fa(name = "fas fa-house", fill = "grey", height = "1em")` &ensp;https://can.gitbiopages.ens-lyon.fr/R_basis/
-
-
 ```{r setup, include=FALSE}
 rm(list=ls())
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
 ```
-```{r klippy, echo=FALSE, include=TRUE}
-klippy::klippy(
-  position = c('top', 'right'),
-  color = "white",
-  tooltip_message = 'Click to copy',
-  tooltip_success = 'Copied !')
-```
 
 # Introduction
 
diff --git a/session_7/session_7.Rmd b/session_7/session_7.Rmd
index e26c559326a4972d8192edd7018d7eb99565ca6c..7ada9ead52b3f9b4312b0acfc5fd6b31e1edeb53 100644
--- a/session_7/session_7.Rmd
+++ b/session_7/session_7.Rmd
@@ -2,34 +2,20 @@
 title: "R.7: String & RegExp"
 author: "Laurent Modolo [laurent.modolo@ens-lyon.fr](mailto:laurent.modolo@ens-lyon.fr)"
 date: "2022"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "../www/style_Rmd.css"
 ---
 
 ```{r include=FALSE}
 library(fontawesome)
-``` 
-
-&ensp;`r fa(name = "fas fa-house", fill = "grey", height = "1em")` &ensp;https://can.gitbiopages.ens-lyon.fr/R_basis/
 
+if("conflicted" %in% .packages())
+    conflicted::conflicts_prefer(dplyr::filter)
+```
 
 ```{r setup, include=FALSE}
 rm(list=ls())
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
 ```
-```{r klippy, echo=FALSE, include=TRUE}
-klippy::klippy(
-  position = c('top', 'right'),
-  color = "white",
-  tooltip_message = 'Click to copy',
-  tooltip_success = 'Copied !')
-```
 
 # Introduction
 
diff --git a/session_8/session_8.Rmd b/session_8/session_8.Rmd
index 35045b14d5244f6c1e0d524f9e059728295654fc..34378260d3af549b08a59832be05f7227095eaab 100644
--- a/session_8/session_8.Rmd
+++ b/session_8/session_8.Rmd
@@ -2,34 +2,20 @@
 title: "R.8: Factors"
 author: "Laurent Modolo [laurent.modolo@ens-lyon.fr](mailto:laurent.modolo@ens-lyon.fr)"
 date: "2022"
-output:
-  rmdformats::downcute:
-    self_contain: true
-    use_bookdown: true
-    default_style: "light"
-    lightbox: true
-    css: "../www/style_Rmd.css"
 ---
 
 ```{r include=FALSE}
 library(fontawesome)
-``` 
-
-&ensp;`r fa(name = "fas fa-house", fill = "grey", height = "1em")` &ensp;https://can.gitbiopages.ens-lyon.fr/R_basis/
 
+if("conflicted" %in% .packages())
+    conflicted::conflicts_prefer(dplyr::filter)
+```
 
 ```{r setup, include=FALSE}
 rm(list=ls())
 knitr::opts_chunk$set(echo = TRUE)
 knitr::opts_chunk$set(comment = NA)
 ```
-```{r klippy, echo=FALSE, include=TRUE}
-klippy::klippy(
-  position = c('top', 'right'),
-  color = "white",
-  tooltip_message = 'Click to copy',
-  tooltip_success = 'Copied !')
-```
 
 # Introduction