Issue with uploading background image

Hello,

I tried to upload new background image, but after uploading I become 0 in the field and the background image doesn't change.
How can I solve this?

SOLVED! I don't know what was the problem but I can upload now.

Can you say me what are the best dimensions for fixed background?

Thank you!

 

Hello,
Paste the following code in your Custom CSS
(Appearance -> Theme Options -> Styling Options -> Custom CSS)

Code:

body{
background-attachment: fixed ! important;
-webkit-background-size: cover  ! important;
-moz-background-size: cover ! important;
-o-background-size: cover ! important;
background-size: cover ! important;
}

This will solve your issue.