diff --git a/modules/webapp/src/main/elm/Api.elm b/modules/webapp/src/main/elm/Api.elm
index 1e167e5b..d816f551 100644
--- a/modules/webapp/src/main/elm/Api.elm
+++ b/modules/webapp/src/main/elm/Api.elm
@@ -80,6 +80,7 @@ module Api exposing
     , login
     , loginSession
     , logout
+    , mergeItems
     , moveAttachmentBefore
     , newInvite
     , postCustomField
@@ -1470,6 +1471,20 @@ getJobQueueStateTask flags =
 --- Item (Mulit Edit)
 
 
+mergeItems :
+    Flags
+    -> List String
+    -> (Result Http.Error BasicResult -> msg)
+    -> Cmd msg
+mergeItems flags items receive =
+    Http2.authPost
+        { url = flags.config.baseUrl ++ "/api/v1/sec/items/merge"
+        , account = getAccount flags
+        , body = Http.jsonBody (Api.Model.IdList.encode (IdList items))
+        , expect = Http.expectJson receive Api.Model.BasicResult.decoder
+        }
+
+
 reprocessMultiple :
     Flags
     -> Set String
diff --git a/modules/webapp/src/main/elm/Comp/ItemMerge.elm b/modules/webapp/src/main/elm/Comp/ItemMerge.elm
index 5498b5ba..a5ba33e1 100644
--- a/modules/webapp/src/main/elm/Comp/ItemMerge.elm
+++ b/modules/webapp/src/main/elm/Comp/ItemMerge.elm
@@ -18,6 +18,7 @@ import Api
 import Api.Model.BasicResult exposing (BasicResult)
 import Api.Model.ItemLight exposing (ItemLight)
 import Api.Model.ItemLightList exposing (ItemLightList)
+import Comp.Basic
 import Comp.MenuBar as MB
 import Data.Direction
 import Data.Fields
@@ -89,6 +90,7 @@ type FormState
     | FormStateHttp Http.Error
     | FormStateMergeSuccessful
     | FormStateError String
+    | FormStateMergeInProcess
 
 
 
@@ -119,8 +121,8 @@ type Msg
     | MergeResp (Result Http.Error BasicResult)
 
 
-update : Msg -> Model -> UpdateResult
-update msg model =
+update : Flags -> Msg -> Model -> UpdateResult
+update flags msg model =
     case msg of
         ItemResp (Ok list) ->
             notDoneResult ( init (flatten list), Cmd.none )
@@ -176,7 +178,14 @@ update msg model =
                     notDoneResult ( model_, Cmd.none )
 
         SubmitMerge ->
-            notDoneResult ( model, Cmd.none )
+            let
+                ids =
+                    List.map .id model.items
+            in
+            notDoneResult
+                ( { model | formState = FormStateMergeInProcess }
+                , Api.mergeItems flags ids MergeResp
+                )
 
         CancelMerge ->
             { model = model
@@ -429,7 +438,7 @@ renderFormState texts model =
         FormStateError msg ->
             div
                 [ class S.errorMessage
-                , class "py-2"
+                , class "my-2"
                 ]
                 [ text msg
                 ]
@@ -437,7 +446,7 @@ renderFormState texts model =
         FormStateHttp err ->
             div
                 [ class S.errorMessage
-                , class "py-2"
+                , class "my-2"
                 ]
                 [ text (texts.httpError err)
                 ]
@@ -445,11 +454,17 @@ renderFormState texts model =
         FormStateMergeSuccessful ->
             div
                 [ class S.successMessage
-                , class "py-2"
+                , class "my-2"
                 ]
                 [ text texts.mergeSuccessful
                 ]
 
+        FormStateMergeInProcess ->
+            Comp.Basic.loadingDimmer
+                { active = True
+                , label = texts.mergeInProcess
+                }
+
 
 templateCtx : Texts -> IT.TemplateContext
 templateCtx texts =
diff --git a/modules/webapp/src/main/elm/Messages/Comp/ItemMerge.elm b/modules/webapp/src/main/elm/Messages/Comp/ItemMerge.elm
index 2aa9d4c5..8d144214 100644
--- a/modules/webapp/src/main/elm/Messages/Comp/ItemMerge.elm
+++ b/modules/webapp/src/main/elm/Messages/Comp/ItemMerge.elm
@@ -31,6 +31,7 @@ type alias Texts =
     , submitMergeTitle : String
     , cancelMergeTitle : String
     , mergeSuccessful : String
+    , mergeInProcess : String
     }
 
 
@@ -48,6 +49,7 @@ gb =
     , cancelMerge = "Cancel"
     , cancelMergeTitle = "Back to select view"
     , mergeSuccessful = "Items merged successfully"
+    , mergeInProcess = "Items are merged …"
     }
 
 
@@ -65,4 +67,5 @@ de =
     , cancelMerge = "Abbrechen"
     , cancelMergeTitle = "Zurück zur Auswahl"
     , mergeSuccessful = "Die Dokumente wurden erfolgreich zusammengeführt."
+    , mergeInProcess = "Dokumente werden zusammengeführt…"
     }
diff --git a/modules/webapp/src/main/elm/Page/Home/Update.elm b/modules/webapp/src/main/elm/Page/Home/Update.elm
index 15ec2b7c..a47db78b 100644
--- a/modules/webapp/src/main/elm/Page/Home/Update.elm
+++ b/modules/webapp/src/main/elm/Page/Home/Update.elm
@@ -583,7 +583,7 @@ update mId key flags settings msg model =
                 SelectView svm ->
                     let
                         result =
-                            Comp.ItemMerge.update lmsg svm.mergeModel
+                            Comp.ItemMerge.update flags lmsg svm.mergeModel
 
                         nextView =
                             if result.done then
diff --git a/modules/webapp/src/main/elm/Page/Home/View2.elm b/modules/webapp/src/main/elm/Page/Home/View2.elm
index ca287b23..0bf0711a 100644
--- a/modules/webapp/src/main/elm/Page/Home/View2.elm
+++ b/modules/webapp/src/main/elm/Page/Home/View2.elm
@@ -51,7 +51,7 @@ viewContent texts flags settings model =
         ]
         (searchStats texts flags settings model
             ++ itemsBar texts flags settings model
-            ++ [ div [ class "relative" ]
+            ++ [ div [ class "sm:relative" ]
                     (itemMergeView texts settings model
                         ++ itemCardList texts flags settings model
                     )
@@ -72,6 +72,7 @@ itemMergeView texts settings model =
                 MergeSelected ->
                     [ div
                         [ class S.dimmerMerge
+                        , class "mt-10 sm:mt-0"
                         ]
                         [ Html.map MergeItemsMsg
                             (Comp.ItemMerge.view texts.itemMerge settings svm.mergeModel)