diff --git a/R/back-next-buttons.R b/R/back-next-buttons.R
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+# The 'handwriterApp' R package performs writership analysis of handwritten
+# documents. Copyright (C) 2024 Iowa State University of Science and Technology
+# on behalf of its Center for Statistics and Applications in Forensic Evidence
+#
+# This program is free software: you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free Software
+# Foundation, either version 3 of the License, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program.  If not, see <https://www.gnu.org/licenses/>.
+
+
+#' Back and Next Buttons Module UI
+#' 
+#' A pair of side-by-side "back" and "next" buttons.
+#'
+#' @param id An ID string that corresponds with the ID used to call the module's
+#'   server function
+#' @param label_back The text label for the "back" button
+#' @param label_next The text label for the "next" button
+#'
+#' @return Action buttons
+#'
+#' @noRd
+backNextUI <- function(id, label_back, label_next){
+  ns <- shiny::NS(id)
+  shiny::tagList(
+    shiny::fluidRow(shiny::column(6, shiny::actionButton(class = "btn-sidebar", 
+                                                         inputId = ns("back"), 
+                                                         label = label_back)),
+                    shiny::column(6, shiny::actionButton(class = "btn-sidebar", 
+                                                         inputId = ns("forward"), 
+                                                         label = label_next))
+    )
+  )
+}
+
+
+#' Back and Next Buttons Module Server
+#' 
+#' A pair of side-by-side "back" and "next" buttons.
+#'
+#' @param id An ID string that corresponds with the ID used to call the module's
+#'   UI function
+#' @param parent_session The parent session of backNextServer() is required for
+#'   backNextServer() to change the selected tab in the parent session.
+#' @param tabs_id The ID of the tabsetPanel in the parent session
+#' @param select_back The ID of the tabPanel the "back" button will navigate to
+#' @param select_next The ID of the tabPanel the "next" button will navigate to
+#'
+#' @return Action buttons
+#'
+#' @noRd
+backNextServer <- function(id, parent_session, tabs_id, select_back, select_next) {
+  shiny::moduleServer(
+    id,
+    function(input, output, session) {
+      shiny::observeEvent(input$back, {
+        shiny::updateTabsetPanel(session = parent_session, inputId = tabs_id, selected = select_back)
+      })
+      
+      shiny::observeEvent(input$forward, {
+        shiny::updateTabsetPanel(session = parent_session, inputId = tabs_id, selected = select_next)
+      })
+    }
+  )
+}