You can add a picture in a form. It can be a logo or a picture to describe something.
To do this, you can add a code into the Extra CCS area:
Your picture need to be accesible by an URL.
Picture at the top
To add a picture, you can use this code, by remplacing the url of your picture :
.form::before{
background: url(xxxxxxxxxxxxxxx) no-repeat;
content: '';
display: block;
height: 40%;
width: 100%;
left: 20%;
position: relative;
}

Logo at the top left
To add a logo, you can use this code, by remplacing the url of your picture :
<b>tr</b>> <b>td</b> <b>div</b> <b>div</b> <b>input</b>{
color: rgb(80, 80, 80) !important;
font-weight: bold;
text-align: center;
}
<b>body</b>{
background: url(xxxxxxxxxxxxxxx);
background-size: 200px;
background-position: left 20px top 80px;
background-repeat: no-repeat;
}
