1/ Create an override of the AcyMailing module in your template
2/ Once it’s done, open the file "default.php"
3/ Let’s modify it now:
- at line 89: add this <div class="input-group" style="background-color: #E0E0E0"><span class="input-group-addon"><i class="fa fa-envelope-o">
- at line 91: replace the CSS class for the input tag like this : class="form-control" + add "float: right;" in the style + close the div at the end of this line
- at line 115: replace the CSS class like this : class="form-control"
- at line 148: replace the CSS class like this : class="btn btn-primary btn-getResponse"
4/ Save and close
5/ Open the AcyMailing module in your module manager.
6/ For the size parameter, try with 90% (should be ok)
7/ Save and enjoy