I have cobbled together the below working code, as a newbie to jsx, i’m sure this code can be better set up, so any advice on that would be appreciated, I cant figure out how to copy the newFilename to the clipboard, so help with that would be apprecaited. as a side note I am looking for a basic introduction to how “functioons work” as I am struggling with this a bit.
cheers

      with (myDoc.documentPreferences) {

  pageHeight = "460 mm";
   pageWidth = "420 mm";
    pagesPerDocument = 1;
      app.activeDocument.zeroPoint = [0, 0];
        app.layoutWindows[0].zoom(ZoomOptions.FIT_PAGE);

  var folders = Folder.desktop.getFiles("*PROOF");
   for (var i=0; i<folders.length; i++) {
    var new_name = folders[i].name.slice(0,7);
      folders[i].rename(new_name);


  var newFilename = new_name.slice(1,7);
   var myDoc = app.activeDocument;
    var file = File(Folder.selectDialog ("Choose a Folder").fsName + "/" + newFilename + "-SS-214.indd");
     myDoc.save(file);

   //myDoc.copy(); //trying to copy file name to clip board doesnt work//

 

  var w = myDoc.documentPreferences.pageWidth;
   var h = myDoc.documentPreferences.pageHeight;
     myPage = myDoc.pages.item(0);
      var myPDFFile = File.openDialog("Choose a PDF File");
        app.pdfPlacePreferences.pageNumber = 1

  app.pdfPlacePreferences.pdfCrop = PDFCrop.CROP_BLEED;
    myPDFPage = myPage.place(File(myPDFFile), [0,15])[0];

  app.activeWindow.transformReferencePoint = AnchorPoint.CENTER_ANCHOR;
    var rects = myDoc.rectangles
     var rect =rects[0] ;
      rect.rotationAngle= 180;


  // PETER KAHREL - CENTRE
  pages = app.activeDocument.pages.everyItem().getElements();
    for (i = 0; i < pages.length; i++) {
       pageItems = pages[i].pageItems.everyItem().getElements();
          app.activeDocument.align (pageItems, AlignOptions.HORIZONTAL_CENTERS, AlignDistributeBounds.PAGE_BOUNDS);
    }


  }

}