Hi,
yes, it is possible, try to see this reply https://www.easy-profile.com/support/font-awesome.html#reply-25955

In the reply we use just the icon but you can change the override text to show icon and text with a code like this:

<i class="icon icon-mail"></i> Email

Hi,
this is possible with CSS code but it is a bit complex. Another way is to override Joomla fields layout but this way is even more complex.

Unfortunately there is not a simple way.

Ok, no Problem to built css. Is there somewhere an example to find?

For example in this site a code like following will make a result like screenshot:

.email1-group .controls:before {

    content: "\f0e0";

    font: normal normal normal 14px/1 FontAwesome;

    float:left;

    width:30px;

    padding-top:7px;

    text-align: center;

    background:#ddd;

    border:1px solid #ccc;

    border-right:0px;

    border-top-left-radius: 3px; 

    border-bottom-left-radius: 3px;

    height:32px;

    

}

.email1-group .controls input{

    width:calc(100% - 30px) !important;

    border-top-left-radius: 0; 

    border-bottom-left-radius: 0;

    display:block;

}

But keep in mind that in this code we use Font-Awesome (Joomla default template uses icomoon) and the height of the icon box is the same of the input (so it is related to your template)

Perfect! Thanks a lot!
The only question i have is to put the label into input (as shown in my screenshot)