diff --git a/build-instructions.md b/build-instructions.md
new file mode 100644
index 0000000..eaf1aa5
--- /dev/null
+++ b/build-instructions.md
@@ -0,0 +1,27 @@
+# The below are instructions for building
+# Scripta Desktop for linux and windows, 
+# adapted from what I do for MacOS
+# you should begin by dowloading the zip
+# archive for the source code at 
+# https://github.com/jxxcarlson/scripta-tauri/releases
+
+# install rust, MacOS or Linux
+curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+
+# instructions for Windows installation of Rust
+https://forge.rust-lang.org/infra/other-installation-methods.html
+
+# install tauri
+cargo install tauri-cli
+
+# build the app
+cargo tauri build
+
+# make the zip file for Windows, 
+# similarly for Linux
+# On MacOS, the is built and placed in
+# /Applications -- let's call this
+# directory APP, and let OS be 
+cp -r APP/scripta-desktop.app .
+zip -r scripta-desktop-windows.zip scripta-desktop.app
+rm -r scripta-desktop.app
diff --git a/src/Main.elm b/src/Main.elm
index 82a4501..af1fad5 100644
--- a/src/Main.elm
+++ b/src/Main.elm
@@ -120,8 +120,8 @@ init flags =
       , doSync = False
       , editorData = { begin = 0, end = 0 }
       , foundIdIndex = 0
-      , searchSourceText = ""
-      , oldSearchSourceText = "___@@@___"
+      , sourceTextFragment = ""
+      , oldSearchSourceFragment = "___@@@___"
       , searchCount = 0
       , selectedId = ""
       , selectionHighLighted = Unselected
@@ -214,7 +214,7 @@ update msg model =
 
         SelectedText str ->
             -- store the text selected in the editor and sent to Elm in the model
-            firstSyncLR { model | searchSourceText = str |> Debug.log "SELECTED TEXT (0)" }
+            syncLR { model | sourceTextFragment = str }
 
         -- InputText { position, source } ->
         --             Frontend.Editor.inputText model { position = position, source = source }
@@ -478,7 +478,7 @@ sync model msg_ =
 
         SendLineNumber editorData ->
             -- This is the code that highlights a line in the source text when rendered text is clicked.
-            ( { model | editorData = editorData |> Debug.log "EDITOR DATA" }, Cmd.none )
+            ( { model | editorData = editorData }, Cmd.none )
 
         SelectId id ->
             -- the element with this id will be highlighted
@@ -629,23 +629,6 @@ updateKeys model keyMsg =
     )
 
 
-
---let
---    pressedKeys =
---        Keyboard.update keyMsg model.pressedKeys
---
---    doSync =
---        if List.member Keyboard.Control pressedKeys && List.member (Keyboard.Character "S") pressedKeys then
---            not model.doSync
---
---        else
---            model.doSync
---in
---( { model | pressedKeys = pressedKeys, doSync = doSync }
---, Cmd.none
---)
-
-
 delayCmd : Float -> msg -> Cmd msg
 delayCmd delay msg =
     Task.perform (\_ -> msg) (Process.sleep delay)
@@ -655,15 +638,24 @@ startSync : Model -> ( Model, Cmd Msg )
 startSync model =
     -- Toggling doSync will cause the editor send the selected text
     -- to Elm where it will be processed by 'SelectedText str'
-    -- and then by firstSyncLR
-    ( { model | doSync = not model.doSync, foundIds = [] }, Cmd.none )
+    -- and then by syncLR
+    ( { model | doSync = not model.doSync }, Cmd.none )
+
+
+syncLR : Model -> ( Model, Cmd Msg )
+syncLR model =
+    if model.sourceTextFragment /= model.oldSearchSourceFragment then
+        firstSyncLR model
+
+    else
+        nextSyncLR model
 
 
 firstSyncLR : Model -> ( Model, Cmd Msg )
 firstSyncLR model =
     let
         foundIds_ =
-            Scripta.API.matchingIdsInAST (model.searchSourceText |> Debug.log "SELECTED TEXT (1)") model.editRecord.tree |> Debug.log "FOUND IDS"
+            Scripta.API.matchingIdsInAST model.sourceTextFragment model.editRecord.tree
 
         id_ =
             List.head foundIds_ |> Maybe.withDefault "(nothing)"
@@ -671,10 +663,9 @@ firstSyncLR model =
     ( { model
         | selectedId = id_
         , foundIds = foundIds_
-        , oldSearchSourceText = model.searchSourceText
-        , foundIdIndex = 1
+        , oldSearchSourceFragment = model.sourceTextFragment
+        , foundIdIndex = 0
         , searchCount = 0
-        , message = id_ ++ ":: " ++ (foundIds_ |> String.join ", ")
       }
     , View.Utility.setViewportForElement Config.renderedTextViewportID id_
     )
@@ -683,32 +674,19 @@ firstSyncLR model =
 nextSyncLR : Model -> ( Model, Cmd Msg )
 nextSyncLR model =
     let
-        foundIds_ =
-            Scripta.API.matchingIdsInAST (model.searchSourceText |> Debug.log "SELECTED TEXT (1)") model.editRecord.tree |> Debug.log "FOUND IDS"
+        n =
+            List.length model.foundIds
 
-        id_ =
-            List.head foundIds_ |> Maybe.withDefault "(nothing)"
+        foundIndex =
+            model.foundIdIndex + 1 |> modBy n
 
-        data =
-            { foundIds = foundIds_
-            , foundIdIndex = 1
-            , cmd = View.Utility.setViewportForElement Config.renderedTextViewportID id_
-            , selectedId = id_
-            , searchCount = 0
-            }
+        id_ =
+            List.Extra.getAt foundIndex model.foundIds
+                |> Maybe.withDefault "(no such index)"
     in
     ( { model
         | selectedId = id_
-        , doSync =
-            if model.foundIdIndex == 0 then
-                not model.doSync
-
-            else
-                model.doSync
-        , foundIds = foundIds_
-        , foundIdIndex = 1
-        , searchCount = 0
-        , message = id_ ++ ":: " ++ (foundIds_ |> String.join ", ")
+        , foundIdIndex = foundIndex
       }
-    , data.cmd
+    , View.Utility.setViewportForElement Config.renderedTextViewportID id_
     )
diff --git a/src/Model.elm b/src/Model.elm
index 6611c07..ed2fcf1 100644
--- a/src/Model.elm
+++ b/src/Model.elm
@@ -22,8 +22,8 @@ type alias Model =
     , doSync : Bool
     , selectedText : String
     , foundIdIndex : Int
-    , searchSourceText : String
-    , oldSearchSourceText : String
+    , sourceTextFragment : String
+    , oldSearchSourceFragment : String
     , searchCount : Int
     , selectedId : String
     , selectionHighLighted : SelectionState
diff --git a/src/Text.elm b/src/Text.elm
index 21990ac..053f3de 100644
--- a/src/Text.elm
+++ b/src/Text.elm
@@ -37,8 +37,8 @@ Click on rendered text (right window).  The corresponding
 source text will be highlighted.
 
 \\item
-Select some source text, then type ctrl-S.  The corresponding
-rendered text will be highlighted.
+Select some source text, then click on "Sync Left > Right" (lower left).  The corresponding
+rendered text will be highlighted.  Push repeatedly if necessary.
 
 \\item
 The editor has lots of features: type ctrl-A to go to the beginning of the
@@ -72,7 +72,8 @@ Visit \\link{scripta.io https://scripta.io} for the web version of this app.
 """
 
 
-microLaTeXDemo = """
+microLaTeXDemo =
+    """
 
 \\title{MicroLaTeX Guide}
 
@@ -337,8 +338,9 @@ buttons in the toolbar on the right.
 
 """
 
-l0Demo = 
-  """
+
+l0Demo =
+    """
 
 | title
 About L0
@@ -435,6 +437,7 @@ begins with `||`.
 
 """
 
+
 l0DemoOLD =
     """
 | title
diff --git a/src/View/Button.elm b/src/View/Button.elm
index 67f32e7..fa5a056 100644
--- a/src/View/Button.elm
+++ b/src/View/Button.elm
@@ -89,7 +89,7 @@ syncLR =
         , tooltipPlacement = below
         , attributes = [ Font.color white, Background.color gray, width (px buttonWidth) ]
         , msg = StartSync
-        , label = "->"
+        , label = "Sync Left > Right"
         }