.af2_custom_builder_wrapper.af2_formularbuilder_preview.af2_preview_mobile_view {
    width: 360px;
}
.af2_custom_builder_wrapper.af2_formularbuilder_preview.af2_preview_ipad_view {
    width: 780px;
}
.af2_custom_builder_wrapper.af2_formularbuilder_preview.af2_preview_desktop_view {
    width: 100%;
}

.af2_custom_builder_wrapper.af2_formularbuilder_preview {
    position: relative;
    margin: auto;
}