Trouble with Thank You page

I am having some trouble with my Thank You page. When I set it up, it looked like there was going to be a white box holding the text, but it turns out, when I actually go through the whole submission process, that the text flows right over my background image and it is not easy to read at all. Is there any way that I can put a darkened transparent box (or at least a white box) behind the text to improve readability? Thank you!

Hi,

Thank you for contacting us.

I can see the background of the Thank You message is transparent and is difficult to read it, now I made some test and I found a way to solve it, you can change the background color to the container and then make the text readable, to do it go to Designer :

Click on the CSS tab , paste this CSS code and Click on Save  :

#stage {

    background : #FFFFFF;

} 

Hope that helps.

Let us know if you have more questions, we will be glad to assist you.

Regards.