Just one doctor, how to center on home page

We have just one doctor in the practice, so we would like to cetner the widget. How do we do that on the home page under the Our Doctors section?

Create a Row and in that row add 3 columns keep 1st and last 3rd columns empty. And in center column add the staff or our doctor element. Make sure you edit that element and make it to display 1 column instead of 3 or 4 columns. 

Also is there a way to change the max height of the Rev Slider on the home page? :-) Thanks! 

Also trying to change the green hover color for the owl carousel nav 

.owl-nav .owl-prev:hover, .owl-nav .owl-next:hover {
    background-color: #56b224;
    color: #FFF !important;
}

You can add this CSS to wp-admin >> Customize > additional CSS and change background color code. 

About alignement of doctor i have donet hat

thanks.

Thanks that worked, can I adjust the height of the Rev slider though?

You can play with slider's height as per your choice. Edit the slider and edit its layout 

Please see layout section in this post how to create slider in WordPress with Revolution slider 6

I also have a video which you can watch to understand the Revolution slider 6 better. Sorry it doesn't have sound. 

https://www.youtube.com/watch?v=qCDg61qUGa8