s

app/pub/css/an.css

@@ -1,5 +1,5 @@
 body {
-    width: 87%;
+    width: 80%;
     margin: 0px auto;
     margin-top: 2%;
     background: #f5f5f5;

app/pub/scripts/anpdf.js

@@ -40,4 +40,7 @@ loadingTask.promise.then(function(pdf) {
 }, function (reason) {
   // PDF loading error
   console.error(reason);
-});
+});
+
+
+  

app/pub/scripts/anviewer.js

@@ -75,6 +75,17 @@ function pdfzoomout(){
 }
 
 
+var cnt = 100;
+function resize_plus(){
+    var div = document.getElementById("the-canvas");
+    cnt += 2;
+    div.style.width = cnt+"%";
+}
+function resize_minus(){
+  var div = document.getElementById("the-canvas");
+  cnt -= 2;
+  div.style.width = cnt+"%";
+}
 function getzoom(){
 
   var name = 'pdfscale';

app/views/anpdf2.phtml

@@ -22,11 +22,11 @@
 <div id="zoomnav">
     <div class="zoompdf zoom-loop">🔍</div>
     <div class="zoompdf"> 
-        <div onclick="pdfzoomin()">
+        <div id="title_plus" onclick="resize_plus()">
-          <span id="title_plus">+</span>
+          <span >+</span>
         </div>
-       <div onclick="pdfzoomout()">
+       <div id="title_minus" onclick="resize_minus()">
-          <span id="title_minus">–</span>
+          <span>–</span>
        </div>
     </div>
 </div>