diff --git a/inst/ShinyApp/server.R b/inst/ShinyApp/server.R
index becdaafea8aa92d66f5524b2f5044496edf01bb6..afeb922ff720761439ce75c2a3020b14a1e0efda 100644
--- a/inst/ShinyApp/server.R
+++ b/inst/ShinyApp/server.R
@@ -280,23 +280,29 @@ server <- function(input, output, session){
   ## Fatalities ###~~~~~~~~~~~~~~~~~~~~~~~~~~###
   observeEvent({
     input$fatalities_input_type
+    input$button_fatalities
   },{
-    output$fatalities_distri_plot <- renderPlot({ plot_gamma(mu = input$fatalities_mean, se = input$fatalities_se) })
-  })
+    output$title_distri_plot <- renderText({ "Mortalités annuelles"  })
+    output$distri_plot <- renderPlot({ plot_gamma(mu = input$fatalities_mean, se = input$fatalities_se) })
+  }, ignoreInit = TRUE)
 
   ## Population size ###~~~~~~~~~~~~~~~~~~~~~~~~~~###
   observeEvent({
     input$pop_size_input_type
+    input$button_pop_size
   },{
-    output$pop_size_distri_plot <- renderPlot({ plot_gamma(mu = input$pop_size_mean, se = input$pop_size_se) })
-  })
+    output$title_distri_plot <- renderText({ "Taille de population"  })
+    output$distri_plot <- renderPlot({ plot_gamma(mu = input$pop_size_mean, se = input$pop_size_se) })
+  }, ignoreInit = TRUE)
 
   ## Population growth ###~~~~~~~~~~~~~~~~~~~~~~~~~~###
   observeEvent({
     input$pop_growth_input_type
+    input$button_pop_growth
   },{
-    output$pop_growth_distri_plot <- renderPlot({ plot_gamma(mu = input$pop_growth_mean, se = input$pop_growth_se) })
-  })
+    output$title_distri_plot <- renderText({ "Taux de croissance de la population"  })
+    output$distri_plot <- renderPlot({ plot_gamma(mu = input$pop_growth_mean, se = input$pop_growth_se) })
+  }, ignoreInit = TRUE)
   ###~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~###
 
 
@@ -327,7 +333,8 @@ server <- function(input, output, session){
       param$fatalities_eli_result <- func_eli(input$fatalities_mat_expert)
 
       ## plot distribution
-      output$fatalities_distri_plot <- renderPlot({ plot_expert(param$fatalities_eli_result$out) })
+      output$title_distri_plot <- renderText({ "Mortalités annuelles"  })
+      output$distri_plot <- renderPlot({ plot_expert(param$fatalities_eli_result$out) })
 
     } else {
       print("missing value")
@@ -345,7 +352,8 @@ server <- function(input, output, session){
       param$pop_size_eli_result <- func_eli(input$pop_size_mat_expert)
 
       ## plot distribution
-      output$pop_size_distri_plot <- renderPlot({ plot_expert(param$pop_size_eli_result$out) })
+      output$title_distri_plot <- renderText({ "Taille de population"  })
+      output$distri_plot <- renderPlot({ plot_expert(param$pop_size_eli_result$out) })
 
     } else {
       print("missing value")
@@ -363,7 +371,8 @@ server <- function(input, output, session){
       param$pop_growth_eli_result <- func_eli(input$pop_growth_mat_expert)
 
       ## plot distribution
-      output$pop_growth_distri_plot <- renderPlot({ plot_expert(param$pop_growth_eli_result$out) })
+      output$title_distri_plot <- renderText({ "Taux de croissance de la population"  })
+      output$distri_plot <- renderPlot({ plot_expert(param$pop_growth_eli_result$out) })
 
     } else {
       print("missing value")
@@ -380,9 +389,8 @@ server <- function(input, output, session){
       param$carrying_cap_eli_result <- func_eli(input$carrying_cap_mat_expert)
 
       ## run elicitation analysis
-      output$carrying_cap_distri_plot <- renderPlot({
-        plot_expert(param$carrying_cap_eli_result$out, show_se = FALSE)
-      })
+      output$title_distri_plot <- renderText({ "Capacité de charge"  })
+      output$distri_plot <- renderPlot({ plot_expert(param$carrying_cap_eli_result$out, show_se = FALSE) })
 
     } else {
       print("missing value")
diff --git a/inst/ShinyApp/ui.R b/inst/ShinyApp/ui.R
index b74dd8d924dd13eba9b2ead71e2095550df1c5a6..85219c7ce5905b5b5aa31ec2da563bba9454a1a2 100644
--- a/inst/ShinyApp/ui.R
+++ b/inst/ShinyApp/ui.R
@@ -278,6 +278,7 @@ rm(list = ls(all.names = TRUE))
                                                                     "Elicitation d'expert" = "eli_exp",
                                                                     "Tendance locale ou régionale" = "trend")),
 
+                                           ## Input values: mean and se
                                            numericInput(inputId = "pop_growth_mean",
                                                         label = "Moyenne de la croissance de la population",
                                                         value = 1.1,
@@ -288,6 +289,7 @@ rm(list = ls(all.names = TRUE))
                                                         value = 0.01,
                                                         min = 0, max = Inf, step = 0.01),
 
+                                           ## Input expert elicitation: table
                                            matrixInput(inputId = "pop_growth_mat_expert",
                                                        value = matrix(data = eli_pop_growth, nrow = 4, ncol = 5,
                                                                       dimnames = list(c("#1", "#2", "#3", "#4"),
@@ -299,13 +301,22 @@ rm(list = ls(all.names = TRUE))
 
                                            actionButton(inputId = "pop_growth_run_expert", label = "Utiliser valeurs experts"),
 
-                                           radioButtons(inputId = "pop_trend",
-                                                        label = NULL,
-                                                        choices = c("Croissance", "Stable", "Déclin")),
-
-                                           radioButtons(inputId = "pop_trend_strength",
-                                                        label = NULL,
-                                                        choices = c("Faible", "Moyen", "Fort")),
+                                           ## Input trend: radio buttons
+                                           {fluidRow(
+                                             # Trend
+                                             column(6,
+                                                    radioButtons(inputId = "pop_trend",
+                                                                 label = "Tendance",
+                                                                 choices = c("Croissance", "Stable", "Déclin")),
+                                             ),
+
+                                             # Strength of trend
+                                             column(6,
+                                                    radioButtons(inputId = "pop_trend_strength",
+                                                                 label = "Force",
+                                                                 choices = c("Faible", "Moyen", "Fort")),
+                                             ),
+                                           )}, # close fluidRow
 
                                 )}, # close wellPanel
 
@@ -423,23 +434,9 @@ rm(list = ls(all.names = TRUE))
                  br(),
                  hr(),
 
-                 h3("Mortalités annuelles", align = "center"),
-                 plotOutput(outputId = "fatalities_distri_plot"),
-                 br(""),
-                 hr(),
-
-                 h3("Taille de la population", align = "center"),
-                 plotOutput(outputId = "pop_size_distri_plot"),
-                 br(""),
-                 hr(),
-
-                 h3("Taux de croissance de la population", align = "center"),
-                 plotOutput(outputId = "pop_growth_distri_plot"),
-                 br(""),
-                 hr(),
-
-                 h3("Capacité de charge: Elicitation d'expert", align = "center"),
-                 plotOutput(outputId = "carrying_cap_distri_plot"),
+                 #h3("Mortalités annuelles", align = "center"),
+                 span(textOutput(outputId = "title_distri_plot"), style="font-size:24px; font-weight:bold"),
+                 plotOutput(outputId = "distri_plot"),
 
         ), # End tabPanel