diff --git a/R/DiseasyActivity.R b/R/DiseasyActivity.R
index 4910ae0a..46a8a160 100644
--- a/R/DiseasyActivity.R
+++ b/R/DiseasyActivity.R
@@ -46,6 +46,7 @@
 #' @return
 #'   A new instance of the `DiseasyActivity` [R6][R6::R6Class] class.
 #' @importFrom Matrix sparseMatrix
+#' @keywords functional-module
 #' @export
 DiseasyActivity <- R6::R6Class(                                                                                         # nolint: object_name_linter
   classname = "DiseasyActivity",
diff --git a/R/DiseasyObservables.R b/R/DiseasyObservables.R
index 59544156..28e2a76d 100644
--- a/R/DiseasyObservables.R
+++ b/R/DiseasyObservables.R
@@ -25,6 +25,7 @@
 #'   rm(obs)
 #' @return
 #'   A new instance of the `DiseasyBaseModule` [R6][R6::R6Class] class.
+#' @keywords functional-module
 #' @export
 DiseasyObservables <- R6::R6Class(                                                                                      # nolint: object_name_linter
   classname = "DiseasyObservables",
diff --git a/R/DiseasySeason.R b/R/DiseasySeason.R
index 9f5627fb..3cd5277b 100644
--- a/R/DiseasySeason.R
+++ b/R/DiseasySeason.R
@@ -25,6 +25,7 @@
 #'   rm(s1, s2)
 #' @return
 #'   A new instance of the `DiseasySeason` [R6][R6::R6Class] class.
+#' @keywords functional-module
 #' @export
 DiseasySeason <- R6::R6Class(                                                                                           # nolint: object_name_linter
   classname = "DiseasySeason",
diff --git a/_pkgdown.yml b/_pkgdown.yml
index 35082858..504d5dce 100644
--- a/_pkgdown.yml
+++ b/_pkgdown.yml
@@ -7,3 +7,32 @@ authors:
     href: https://www.ssi.dk/
     html: >-
       <img src="https://www.ssi.dk/assets/images/ssi-logo-optimeret.svg" alt="SSI" height="64" style="margin-bottom: 0.5em; margin-top: 1.5em;" />
+
+reference:
+  - title: Functional modules
+    desc: The building blocks of diseasy.
+    contents:
+    - has_keyword("functional-module")
+
+  - title: Data sets
+    desc: Data for the functional modules
+    contents:
+    - has_keyword("data")
+
+  - title: Developer functions
+    desc: Functions to create model templates.
+    contents:
+    - DiseasyBaseModule
+    - DiseasyModel
+    - diseasyoption
+
+articles:
+- title: Functional modules
+  navbar: Functional modules
+  contents:
+  - starts_with("diseasy")
+
+- title: Developer guides
+  navbar: Developer guides
+  contents:
+  - creating-a-model
diff --git a/man/DiseasyActivity.Rd b/man/DiseasyActivity.Rd
index 6494c9f6..5d53f768 100644
--- a/man/DiseasyActivity.Rd
+++ b/man/DiseasyActivity.Rd
@@ -54,6 +54,7 @@ See vignette("diseasy-activity") for examples of use.
 \seealso{
 \link{dk_activity_units}
 }
+\keyword{functional-module}
 \section{Super class}{
 \code{\link[diseasy:DiseasyBaseModule]{diseasy::DiseasyBaseModule}} -> \code{DiseasyActivity}
 }
diff --git a/man/DiseasyObservables.Rd b/man/DiseasyObservables.Rd
index e01695d6..2a465d51 100644
--- a/man/DiseasyObservables.Rd
+++ b/man/DiseasyObservables.Rd
@@ -40,6 +40,7 @@ See vignette("diseasy-observables")
 
 \link[SCDB:get_table]{SCDB::get_table}
 }
+\keyword{functional-module}
 \section{Super class}{
 \code{\link[diseasy:DiseasyBaseModule]{diseasy::DiseasyBaseModule}} -> \code{DiseasyObservables}
 }
diff --git a/man/DiseasySeason.Rd b/man/DiseasySeason.Rd
index dfb45d28..77d57cbb 100644
--- a/man/DiseasySeason.Rd
+++ b/man/DiseasySeason.Rd
@@ -34,6 +34,7 @@ See the vignette("diseasy-season") for examples of use.
 \seealso{
 \link{DiseasyObservables}
 }
+\keyword{functional-module}
 \section{Super class}{
 \code{\link[diseasy:DiseasyBaseModule]{diseasy::DiseasyBaseModule}} -> \code{DiseasySeason}
 }