I think your problem is different from hidden link. Because he was using another theme before and it tabs having issues with Google Map and that theme's JS codes were shrinking the Map. Now he has changed the theme and it tab layout style, so now its working.
Google map field from our tutorial is just example how to add custom fields, not fully featured Google map field. Some people found it useful and use it. We're planning to add fully featured Google Map field but I can not tell yet when it's going to be ready.
Please explain little more about your requirement, hope we can help you more.
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I made some changes in your content template. Please check now and let me know your feedback.
Still there are some issues, I feel it is conflict with your theme. Map is looking better when I switch to default 2013 theme. I will check with our developers and get back to you.
The issue about the zoom bar not being correctly displayed is caused by a theme CSS conflic, as we guessed. Please add this to your CS file, or inside the CSS section of the involved Content Template:
#content .google-maps img {
max-width: none;
}
That should do the trick 😀
Please let me know if you are satisfied with our answer and if we can help you with anything else.