diff --git a/src/App/ZoneInterface.purs b/src/App/ZoneInterface.purs
index 0b3ba56..e49ffe7 100644
--- a/src/App/ZoneInterface.purs
+++ b/src/App/ZoneInterface.purs
@@ -131,24 +131,38 @@ data Update_Local_Form
   | Update_Local_Form_SRVRR  Update_SRV_Form
 
 data Action
+  -- | Create a modal to ask confirmation before deleting a resource record.
   = DeleteRRModal RRId
+
+  -- | Cancel the current displayed modal.
   | CancelModal
+
+  -- | Create a new resource record modal (a form) for a certain type of component.
   | NewRRModal AcceptedRRTypes
 
+  -- | Initiate the component. This means asking the content of the zone to `dnsmanagerd`.
   | Initialize
 
-  -- Add new entries.
+  -- | Add a new resource record to the zone.
   | AddRR AcceptedRRTypes ResourceRecord
-  -- Validate a new resource record before adding it.
+
+  -- | Validate a new resource record before adding it.
   | ValidateRR AcceptedRRTypes
+
+  -- | Validate the entries in an already existing resource record.
   | ValidateLocal RRId AcceptedRRTypes
+
+  -- | Save the changes done in an already existing resource record.
   | SaveLocal ResourceRecord
 
-  -- Update new entry form (in the `active_new_rr_modal` modal).
+  -- | Update new entry form (in the `active_new_rr_modal` modal).
   | UpdateNewRRForm Update_MODAL_Form
 
-  -- Update an already active entry.
-  | UpdateLocalForm RRId Update_Local_Form
+  -- TODO: Update an already existing resource record.
+  | UpdateLocalForm (SRVRR ())
+
+  -- | Update an already active entry.
+  | UpdateLocalRR RRId Update_Local_Form
 
   | SaveSRR   RRId
   | SaveMXRR  RRId
@@ -511,7 +525,14 @@ handleAction = case _ of
       $ DNSManager.MkAddRR { domain: state._domain, rr: newrr }
     H.raise $ MessageToSend message
 
-  UpdateLocalForm rr_id form -> case form of
+  UpdateLocalForm entry -> do
+    state <- H.get
+    H.raise $ Log $ SimpleLog $ "Let's try to update entry number " <> show entry.rrid
+    let replaceRR rr1 rr2 | rr1.rrid == rr2.rrid = rr1
+                          | otherwise            = rr2
+    H.modify_ _ { _resources = (map (replaceRR entry) state._resources) }
+
+  UpdateLocalRR rr_id form -> case form of
     Update_Local_Form_SRR rr_update -> case rr_update of
       Update_SRR_Domain val -> do
         -- H.raise $ Log $ SimpleLog ("Update local RR " <> show rr_id <> " name: " <> val)
@@ -578,7 +599,7 @@ handleAction = case _ of
         state <- H.get
         H.modify_ _ { _srvrr = (update_port rr_id val state._srvrr) }
 
-  -- TODO: validate any local RR with the new _resources and _local_errors.
+  -- | validate any local RR with the new _resources and _local_errors.
   ValidateLocal local_rr_id t -> do
     state <- H.get
     case first (\rr -> rr.rrid == local_rr_id) state._resources of
@@ -594,10 +615,6 @@ handleAction = case _ of
             let new_error_hash = Hash.delete local_rr.rrid state._local_errors
             H.modify_ _ { _local_errors = new_error_hash }
             handleAction $ SaveLocal rr
-            message <- H.liftEffect
-              $ DNSManager.serialize
-              $ DNSManager.MkUpdateRR { domain: state._domain, rr: rr }
-            H.raise $ MessageToSend message
 
   SaveLocal rr -> do
     state <- H.get
@@ -809,7 +826,7 @@ render_resources errors records
 --          , HH.td_ [ Bulma.btn_delete (\_ -> DeleteRRModal rr.rrid) ]
 --          ]
 --        ] <> error_row rr
---    update_simple rrid v = (UpdateLocalForm rrid) <<< Update_Local_Form_SRR <<< v
+--    update_simple rrid v = (UpdateLocalRR rrid) <<< Update_Local_Form_SRR <<< v
 --    error_row rr = case Hash.lookup rr.rrid errors of
 --      Nothing -> []
 --      Just error_array -> [ HH.tr_ $
@@ -850,7 +867,7 @@ render_records errors records
           , HH.td_ [ Bulma.btn_delete (\_ -> DeleteRRModal rr.rrid) ]
           ]
         ] <> error_row rr
-    update_simple rrid v = (UpdateLocalForm rrid) <<< Update_Local_Form_SRR <<< v
+    update_simple rrid v = (UpdateLocalRR rrid) <<< Update_Local_Form_SRR <<< v
     error_row rr = case Hash.lookup rr.rrid errors of
       Nothing -> []
       Just error_array -> [ HH.tr_ $
@@ -895,7 +912,7 @@ render_mx_records errors records
                , HH.td_ [ Bulma.btn_delete (\_ -> DeleteRRModal rr.rrid) ]
                ]
              ] <> error_row rr
-    update_mx rrid v = (UpdateLocalForm rrid) <<< Update_Local_Form_MXRR <<< v
+    update_mx rrid v = (UpdateLocalRR rrid) <<< Update_Local_Form_MXRR <<< v
     error_row rr = case Hash.lookup rr.rrid errors of
       Nothing -> []
       Just error_array ->
@@ -936,7 +953,7 @@ render_srv_records errors records
           , HH.td_ [ Bulma.btn_delete (\_ -> DeleteRRModal rr.rrid) ]
           ]
         ] <> error_row rr
-    update_srv rrid v = (UpdateLocalForm rrid) <<< Update_Local_Form_SRVRR <<< v
+    update_srv rrid v = (UpdateLocalRR rrid) <<< Update_Local_Form_SRVRR <<< v
     error_row rr = case Hash.lookup rr.rrid errors of
       Nothing -> []
       Just error_array ->
@@ -1033,7 +1050,7 @@ update f rr_id records = map doSmth records
   where
     doSmth rr
       | rr_id == rr.rrid = f rr
-      | otherwise     = rr
+      | otherwise        = rr
 
 fromResourceRecordToLocalRepresentationSimpleRR :: ResourceRecord -> Maybe (SimpleRR ())
 fromResourceRecordToLocalRepresentationSimpleRR new_rr =