diff --git a/.DS_Store b/.DS_Store
index 4c4933b5..a1bf91b2 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/samples/3d-marker-customization/index.html b/samples/3d-marker-customization/index.html
index 46b6918b..a0bb187a 100644
--- a/samples/3d-marker-customization/index.html
+++ b/samples/3d-marker-customization/index.html
@@ -1,4 +1,5 @@
 <!doctype html>
+<!-- [START maps_3d_marker_customization] -->
 <html>
   <head>
     <title>Map</title>
@@ -9,7 +10,9 @@
   <body>
     <div id="map"></div>
 
+    <!-- prettier-ignore -->
     <script>(g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})
         ({key: "AIzaSyA6myHzS10YXdcazAFalmXvDkrYCp5cLc8", v: "alpha",});</script>
   </body>
 </html>
+<!-- [END maps_3d_marker_customization] -->
\ No newline at end of file
diff --git a/samples/3d-places/index.html b/samples/3d-places/index.html
index 6454e633..405b2905 100644
--- a/samples/3d-places/index.html
+++ b/samples/3d-places/index.html
@@ -1,4 +1,5 @@
 <!doctype html>
+<!-- [START maps_3d_places] -->
 <html>
   <head>
     <title>Map</title>
@@ -9,6 +10,7 @@
   <body>
     <div id="map"></div>
 
+    <!-- prettier-ignore -->
     <script>(g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})
         ({key: "AIzaSyA6myHzS10YXdcazAFalmXvDkrYCp5cLc8", v: "alpha",});</script>
     <div id="details" class="detailsContainer">
@@ -21,3 +23,4 @@
     </div> 
   </body>
 </html>
+<!-- [END maps_3d_places] -->
diff --git a/samples/3d-popover-location/index.html b/samples/3d-popover-location/index.html
index 46b6918b..8be100d6 100644
--- a/samples/3d-popover-location/index.html
+++ b/samples/3d-popover-location/index.html
@@ -1,4 +1,5 @@
 <!doctype html>
+<!-- [START maps_3d_popover_location] -->
 <html>
   <head>
     <title>Map</title>
@@ -9,7 +10,9 @@
   <body>
     <div id="map"></div>
 
+    <!-- prettier-ignore -->
     <script>(g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})
         ({key: "AIzaSyA6myHzS10YXdcazAFalmXvDkrYCp5cLc8", v: "alpha",});</script>
   </body>
 </html>
+<!-- [END maps_3d_popover_location] -->
\ No newline at end of file
diff --git a/samples/3d-popover-marker/index.html b/samples/3d-popover-marker/index.html
index 46b6918b..1e9dd6a1 100644
--- a/samples/3d-popover-marker/index.html
+++ b/samples/3d-popover-marker/index.html
@@ -1,4 +1,5 @@
 <!doctype html>
+<!-- [START maps_3d_popover_marker] -->
 <html>
   <head>
     <title>Map</title>
@@ -9,7 +10,9 @@
   <body>
     <div id="map"></div>
 
+    <!-- prettier-ignore -->
     <script>(g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})
         ({key: "AIzaSyA6myHzS10YXdcazAFalmXvDkrYCp5cLc8", v: "alpha",});</script>
   </body>
 </html>
+<!-- [END maps_3d_popover_marker] -->
\ No newline at end of file
diff --git a/samples/3d-simple-map/index.html b/samples/3d-simple-map/index.html
index 2561de66..d20c411f 100644
--- a/samples/3d-simple-map/index.html
+++ b/samples/3d-simple-map/index.html
@@ -1,4 +1,5 @@
 <!doctype html>
+<!-- [START maps_3d_simple_map] -->
 <html>
   <head>
     <title>Simple Map</title>
@@ -9,7 +10,9 @@
   <body>
     <gmp-map-3d mode="hybrid" center="37.7704,-122.3985,500" tilt="67.5"></gmp-map-3d>
 
+    <!-- prettier-ignore -->
     <script>(g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})
         ({key: "AIzaSyA6myHzS10YXdcazAFalmXvDkrYCp5cLc8", v: "alpha",});</script>
   </body>
 </html>
+<!-- [END maps_3d_simple_map] -->
diff --git a/samples/3d-simple-marker/index.html b/samples/3d-simple-marker/index.html
index 46b6918b..be64ed8e 100644
--- a/samples/3d-simple-marker/index.html
+++ b/samples/3d-simple-marker/index.html
@@ -1,4 +1,5 @@
 <!doctype html>
+<!-- [START maps_3d_simple_marker] -->
 <html>
   <head>
     <title>Map</title>
@@ -9,7 +10,9 @@
   <body>
     <div id="map"></div>
 
+    <!-- prettier-ignore -->
     <script>(g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})
         ({key: "AIzaSyA6myHzS10YXdcazAFalmXvDkrYCp5cLc8", v: "alpha",});</script>
   </body>
 </html>
+<!-- [END maps_3d_simple_marker] -->
