diff --git a/layout/columns2.php b/layout/columns2.php
index 076ca6a..5480d70 100644
--- a/layout/columns2.php
+++ b/layout/columns2.php
@@ -32,6 +32,15 @@ if (isloggedin()) {
 } else {
     $navdraweropen = false;
 }
+
+$show_btn_leftblock = false;
+if(is_siteadmin()){
+    $show_btn_leftblock = true;
+}else{
+    set_user_preference('drawer-open-nav', false);
+    $navdraweropen = false;
+}
+
 $extraclasses = [];
 if ($navdraweropen) {
     $extraclasses[] = 'drawer-open-left';
@@ -145,7 +154,8 @@ $templatecontext = [
     "footerblock1" => $footerblock1,
     "colclass" => $colclass,
     "block1" => $block1,
-    "footlogourl" => $footlogourl
+    "footlogourl" => $footlogourl,
+    "show_btn_leftblock"=>$show_btn_leftblock
 ];
 
 $templatecontext['flatnavigation'] = $PAGE->flatnav;
diff --git a/layout/course.php b/layout/course.php
index cf992ec..a7da429 100644
--- a/layout/course.php
+++ b/layout/course.php
@@ -35,6 +35,15 @@ if (isloggedin()) {
 } else {
     $navdraweropen = false;
 }
+
+$show_btn_leftblock = false;
+if(is_siteadmin()){
+    $show_btn_leftblock = true;
+}else{
+    set_user_preference('drawer-open-nav', false);
+    $navdraweropen = false;
+}
+
 $extraclasses = [];
 if ($navdraweropen) {
     $extraclasses[] = 'drawer-open-left';
@@ -150,7 +159,8 @@ $templatecontext = [
     "footerblock1" => $footerblock1,
     "colclass" => $colclass,
     "block1" => $block1,
-    "footlogourl" => $footlogourl
+    "footlogourl" => $footlogourl,
+    "show_btn_leftblock"=>$show_btn_leftblock
 ];
 
 //var_dump($COURSE);
diff --git a/layout/includes/header.php b/layout/includes/header.php
index ed5397b..05a84ed 100644
--- a/layout/includes/header.php
+++ b/layout/includes/header.php
@@ -30,8 +30,19 @@ require_once($CFG->libdir . '/behat/lib.php');
 if (isloggedin()) {
     $navdraweropen = (get_user_preferences('drawer-open-nav', 'true') == 'true');
 } else {
+    set_user_preference('drawer-open-nav', false);
     $navdraweropen = false;
 }
+
+$show_btn_leftblock = false;
+if(is_siteadmin()){
+    $show_btn_leftblock = true;
+}else{
+    set_user_preference('drawer-open-nav', false);
+    $navdraweropen = false;
+}
+
+
 $extraclasses = [];
 if ($navdraweropen) {
     $extraclasses[] = 'drawer-open-left';
@@ -110,7 +121,8 @@ $templatecontext = [
     "url" => $url,
     "infolink" => $infolink,
     "navbarclass" => $navbarclass,
-    "footlogourl" => $footlogourl
+    "footlogourl" => $footlogourl,
+    "show_btn_leftblock"=>$show_btn_leftblock
 ];
 
 
diff --git a/layout/my.php b/layout/my.php
index 515cb8c..4927bb7 100644
--- a/layout/my.php
+++ b/layout/my.php
@@ -32,6 +32,14 @@ if (isloggedin()) {
 } else {
     $navdraweropen = false;
 }
+$show_btn_leftblock = false;
+if(is_siteadmin()){
+    $show_btn_leftblock = true;
+}else{
+    set_user_preference('drawer-open-nav', false);
+    $navdraweropen = false;
+}
+
 $extraclasses = [];
 if ($navdraweropen) {
     $extraclasses[] = 'drawer-open-left';
@@ -147,7 +155,8 @@ $templatecontext = [
     "colclass" => $colclass,
     "block1" => $block1,
     "footlogourl" => $footlogourl,
-    "username" => $username
+    "username" => $username,
+    "show_btn_leftblock"=>$show_btn_leftblock
 ];
 
 $templatecontext['flatnavigation'] = $PAGE->flatnav;
diff --git a/templates/navbar.mustache b/templates/navbar.mustache
index 3fb2479..df1be58 100644
--- a/templates/navbar.mustache
+++ b/templates/navbar.mustache
@@ -23,10 +23,12 @@
 
 
         <div data-region="drawer-toggle" class="d-inline-block mr-3">
+            {{#show_btn_leftblock}}
             <button aria-expanded="{{#navdraweropen}}true{{/navdraweropen}}{{^navdraweropen}}false{{/navdraweropen}}" aria-controls="nav-drawer" type="button" class="btn nav-link float-sm-left mr-1 btn-secondary" data-action="toggle-drawer" data-side="left" data-preference="drawer-open-nav">{{#pix}}i/menubars{{/pix}}<span class="sr-only">{{#str}}sidepanel, core{{/str}}</span>
             <span aria-hidden="true"> </span>
             <span aria-hidden="true"> </span>
             <span aria-hidden="true"> </span>
+            {{/show_btn_leftblock}}
 
             </button>